I have a series of times and I am trying to find the difference in time between two values which is fine for a normal day however some times pass midnight e. You have to account for crossing midnight. per hour. Same as minutes we can also get the difference in seconds. NOTE. In that case you need to: Add a numeric field (short, long, float, double) to your table. By belle08 in forum Excel General Replies: 4 Last Post: 01-27-2014, 03:47 PM. Below is the formula that will give you the time difference in hours: = (B2-A2)*24. 1 Use of the TODAY Function. Now just subtract the Start Work time by using the. . "Midnight" is 00:00:00 and is only recognized as belonging to the following day. When I calculate the difference between two time, I must also pay attention to what happens after midnight. 8PM to 5AM for example. To apply the custom time format, click Ctrl + 1 to open the Format Cells dialog, select Custom from the Category list and type the time codes in the Type box. Its direction, height, illumination, and lunar phases calendar. Hi I am looking for a way to subtract NOW() from a particular cell which has an example time of 17:23. . Start. In addition, Daylight Saving Time / Summer Time and automatic time zone. In Excel I have been trying to find an easier way to calculate a time difference where the times cross midnight. I need to be able to work out the amount of worked time that fits into a certain time period. 83 or something like that. 1:00 am. Solution: You have to change to the correct value. Time. The result shows the current date and time, probably formatted like this: 6/26/2014 9:57. I have a solution based on A clever formula from Daniel Maher that will calculate time within a period. Table of Contents hide. select * ,datediff (second, cast ( [schedule_deptime]as time), cast ( [prev_announce_time]as time)) as kpi1_delta. For instance, If the border closes at midnight, and our truck arrives at 10 PM, we should in theory be able to get in line and get across (but I still want the 12 hours crossing time factored in for padding) If we arrive at 11PM and the border closes at. 25*24 =6I have tried using a standard formula to calculate the time difference between two bike rides in Excel. AddDays (1); double remaining =. To sort out this issue, you have to make changes in the number format of the values given in the cells A2, B2, and C2 to General. Figure 3. like System time :- 01:00:00 pm manual time :- 12:50:00 pm ans :- 00:10 when clock reach 01:00:00 pm then 00:11 when clock reach 01:01:00 pm then 00:12 when clock reach 01:02:00 pm and so on. If the start time of the work day is later than the end time of the work day, the formula nets zero. Often you may want to calculate the number of hours between two times after midnight in Excel. So, when you multiply the time difference by 24, you will get the time duration in hours. Zulu time is another name for Coordinated Universal Time (UTC), which is the time at 0° longitude at the Greenwich Meridian. When you are using. From([Stop]-[Start]), it works as long as the times are on the same day, otherwise it gives me a negative time. A simple formula is used and then a. They work on shifts and the operation is 24 hours. All you need to do is to use the following formula. Is there any formula to calculate Start time to End time with excluding lunch time? Here is example : Lunch time :12:00pm to 1:00pm. Month, today. You also can use the TEXT function to calculate the time difference (hours) in Excel. If,. If Function In Time Range - Excel. And now, let's see how our time difference formula and time codes work in real worksheets. This tip applies to Excel 2007, 2010, 2013, 2016, 2019, and Excel in Microsoft 365. If you land in California, you would list the time as it was in the Pacific time zone. It respects the regional format of %TIME% without taking any assumptions on type of characters for time and decimal separators. Timesheets for Night-shifts Excel Timesheets to calculate Nightshifts. Regular Rate of Pay. We have a client who will pay using the 1/4, 1/2/ and 3/4 of an hour increments as follows: From the hour mark to 6 minutes = 0 time paid. Hi all, i have a start time (from) and and end time (to) of a shift that can cross midnight. Present the result in the standard time format. In Excel I have been trying to find an easier way to calculate a time difference where the times cross midnight. Here is how Excel computes this return: (Number of days between both dates + a fraction for the difference in the number of hours). Hi all, i have a start time (from) and and end time (to) of a shift that can cross midnight. Formula To Calculate Time Difference Crossing Midnight - Excel. Ask Question Asked 3 years 11 months ago. "Day" hours can be calculated by 2300 minus time-in (if <2300), then "Night" hours are total hours minus "Day" hours. Formula To Calculate Time Difference Crossing Midnight - Excel. , there are a total of 9 time zones used. There are two approaches that you can take to present the results in the standard time format (hours : minutes : seconds). In Excel I have been trying to find an easier way to calculate a time difference where the times cross midnight. 67 hours. Start. 16 minutes to 30 minutes = 1/2 hour 30. HTH. All works fine until the calculation goes before 24:00. Formula To Calculate Time Difference Crossing Midnight - Excel. Time differences between time zones are simple to work out due to the Universal Time Coordinated (UTC). Looking at this example, you might wonder why C10 works, but C11 doesn’t. We have a client who will pay using the 1/4, 1/2/ and 3/4 of an hour increments as follows: From the hour mark to 6 minutes = 0 time paid. m. First, we’ll use the CDate function of VBA to convert the strings to times. This particular example calculates the number of hours between the starting time in cell A2 and the ending time in cell B2, assuming midnight occurs between these two times. Using the TEXT Function to Calculate Hours Between Two Times in Excel. 46 minutes to 60 minutes = one hour. I'm using the 4 digit military time and also I need the formula to calculate across midnight. I need to return the answer both in time (custom hh:mm) and also in decimals. 3 Answers. This works great and gives me the hours worked in a day until I enter a value after midnight for the end time. There are several ways to calculate the difference between two times. e. Another way to solve this problem would be with the help of the MOD function. But a few in the 2nd column will cross midnight. Formula: Please Login or Register to view. " In this case both times belong to the same date and wake_time>bed_time. For example, if you depart from New York City, you would write the time as it was in the Eastern time zone. The following formulas give ways to calculate the net Profit or Loss and how to display that information when using the Spreadsheet System for Trading. Most of these times are between 9pm and. Example: Start time: 23:50:00 End time: 00:15:00 How would you formulate an equation to determine the duration of time or differnce between the start and end time?There are several ways to calculate the difference between two times. To understand time arithmetic more fully, you need to understand first how Excel stores times. TEXT(C5-B5,"h"" hrs ""m"" mins """) This is an example of embedding text into a custom number format, and this text must be surrounded by an extra pair of double. Is there any formula to calculate Start time to End time with excluding lunch time? Here is example : Lunch time :12:00pm to 1:00pm. Hi I have a formula to calculate the difference between 2 timecards from shifts that my workers are doing. Select the data range for the table. and then update the difference every second. I have seen the sumproduct before and it's tried and tested, but I have yet to find a formula that does all of this AND accounts for if the start time is prior to midnight but the end time is after midnight. Start Time (8:00am)Hi, I have data in column B from Cell B5 onward. Following our example above, 56 hours is our base. In Excel I have been trying to find an easier way to calculate a time difference where the times cross midnight. For example,. Bij this code you can calculate the difference even over night. Time is stored as a decimal which represents a fraction of a day. Re: How to calculate hours when it goes after midnight. 2. You made a comment to this effect on another post) For example, to check if it's between 5 AM and 9:30 PM. The hour angle is indicated by an orange arrow on the celestial equator plane. End Time (B1): 5:00 PM. It will replace End Times with 17:00 and Start Times with 09:00 if the End Time is later than 5 PM or the Start Time is earlier than 9 AM. After the ‘if’ word, we’ll start typing out the condition itself – the ‘Start Work’ time (the value in cell C7) is greater than the ‘End Work’ time (the value in cell D7), which is true for the working time that spans midnight. (based on collections) Would like to enter payment and date. And if the value already contains a text, make sure it is valid. For example lets say on April 31st I have a time of 23:30 and on May 1st I have a time of 00:22. Times that cross midnight. " In this case both times belong to the same date and wake_time>bed_time. 2. Now we need to indicate what value Excel should work with if. Hi, I using this formals to calculate the night shift hours Calculation Start 18pm to 5am anything after 11hrs won. Over 7 minutes to 15 minutes = 1/4 hour 15. That is, the range has an inclusive start, and an exclusive end. 3K subscribers Subscribe 16K views 6 years ago If. e. 2 Use of the NOW Function. In the screenshot below, column C shows the difference between the time in consecutive rows (column. To get the correct calculated result between two times over midnight, you can apply the following formula: 1 . In this formula, replace C2 with the cell where you have your end date, and replace B2 with the cell where you have your start date. Formula To Calculate Time Difference Crossing Midnight - Excel. 4: Aug 25, 2007: Countifs with different restrictions: 1: Nov 29, 2012: Averaging Duration of Time: Duration Longer than 24hr: 2: Apr 10, 2008: Convert times to text string: 3: Apr 21, 2010 [NEWBIE] date/time diff: 4: Jun 25, 2009: formula to calculate time difference crossing midnight: 3: Aug 17. times don't go over midnight. We would like to show you a description here but the site won’t allow us. , numbers of seconds after midnight of. There are two approaches that you can take to present the results in the standard time format (hours : minutes : seconds). Duration Process :6 hours. Start. In SAS, you use the INTCK function to calculate the difference between two timestamps. Type in the comma and we’ll move on. 1:00 am. The above-mentioned formula is not useful if the first time value is before midnight and the ending time value is after midnight. Calculate Time Intersect Between 2 Time Ranges - Excel: Hi I have two sets of data in two sheets both containing time ranges (i. 30am-10pm. 6. How To Convert Time (9:15) To Time In Quarter Hours (9. After the ‘if’ word, we’ll start typing out the condition itself – the ‘Start Work’ time (the value in cell C7) is greater than the ‘End Work’ time (the value in cell D7), which is true for the working time that spans midnight. Is there any formula to calculate Start time to End time with excluding lunch time? Here is example : Lunch time :12:00pm to 1:00pm. Then use the formula =A2-A1 to get the time difference. Re: Tiimelog - Time Difference Crossing Over or Past Midnight. Time. Figure 2. Same as minutes we can also get the difference in seconds. Press the keys Ctrl + 1 to open the Format Cells dialog box; Select the time format “ h:mm:ss ” Figure 4. Use ; instead of , in the formulas if your region uses , as a. 0 -- 1440 min/day -- or. calculate time difference crossing midnight and exclude non working hours and weekend. It is essentially used to set the current time zone and then set a time using the spin buttons. Cells (rfnd, cfnd - 2) This issue is when the end time is midnight (ie 0:00AM) The line in blue catches whether the end time is midnight. In this video, you will see the easiest way to find the time difference between two dates and times that go past midnight. Second: Returns a second value from a DateTime value: Time. Find the exact time difference with the Time Zone Converter – Time Difference Calculator which converts the time difference between places and time zones all over the world. In Excel I have been trying to find an easier way to calculate a time difference where the times cross midnight. 25) - Excel. Enter this formula: =(B2-A2+(B2<A2))*24 (A2 is the earlier time, B2 is the later time, you can change them as you need) into a blank cell which beside your time data, see. The bread bakes for a total of 50 minutes The oven needs to be pre-heated 1 hour prior to baking. Calculate On Time Delivery - Excel. I have formatted A1 and A2 as "Time, 1:30 PM. Formulas: Results:. Formula To Calculate Time Difference Crossing Midnight - Excel. Just my my 5ct advice: Use real calc date + time (datetime) as start and end values and every duration (!!!) in hours simply calculates as =A2-A1 formatted by [HH]:MM. #1 I have several sheets with columns of just times (no dates). this assumes that a shift runs no longer than 23hrs. 24 hours is 1, 0. The following formula computes the time difference between the mid-day and the time at which the object's shadow equals t times the length of the object itself plus the length of that object's shadow at noon: Thus, in the first four schools of thought, Asr = Dhuhr + A (1), and in Hanafi school, Asr = Dhuhr + A (2). Anyone with assistance would be greatly appreciated. someone started at 16:00 end ended at 03:30. However, I want to allow local managers to supply beginning and ending Times in their local time zone. Calculate Late And Under Time - Happy Day to all Can you please help me A1 time. Time interval formula. Formula To Calculate Time Difference Crossing. 5 × 10 = 75. Duration Process :6 hours. Time crossing midnight. 1900) and then do the calculation and in case the timeto is smaller it will get to previous day, but convert to time will get the time part from it. 6. And now, let's see how our time difference formula and time codes work in real worksheets. time-dep. e. If I calculate TAT for this time period it should show me 1 hour 33 minutes, why because business hours are closing by 5:00 PM on 10/29 so it should not calculate duration after 5:00 PM to until 08:00 AM on next day, however 10/29 is Friday so formula should calculate the duration from 10/29 Friday 3:37 PM to 10/29 5:00 PM and again it should. Rename the new query “TotalTime”. Enter this formula: =SUM((C2-B2)+(E2-D2))*24 into a blank cell beside your time record cells, F2, for instance, see screenshot: Note: In the above formula: C2 is the lunch start time, B2 is the log in time, E2 indicates the log out time and D2 is. =(end_time-start_time)*86400. Duration Process :6 hours. 10pm-7. Standard times are shown as positive or negative deviations of UTC, that's why time differences are calculated by determining UTC and calculating each time zone from there. . If your time runs across midnight in Exc. 18:00 - 00:30 The time difference is 6 hours 30 minutes which I would like returned in a numerical value e. This will convert the times to datetime for day 0 (1. It's 18 hours later. . Conditional Formatting Using Hours/time - Excel. I want to calculate the number of hours done within 8am till 18:30pm and 18:30pm to 8am. Heres the formula which you need to use. g. Here is one way: I put the target "sleep at" time in B1. The data in question is a graph of a bedtime, when the time to bed is after midnight the scaling of the chart becomes so great that important details and fluctuations in time are hard to see. In Excel I have been trying to find an easier way to calculate a time difference where the times cross midnight. 🔗 Steps: Type the following formula on cell D5. Is there any formula to calculate Start time to End time with excluding lunch time? Here is example : Lunch time :12:00pm to 1:00pm. 3. [*] Enter an array formula by pressing ctrl+shift+Enter instead. You can use the TEXT function instead of using the HOUR function to calculate the hours between two times directly. Formula To Calculate Time Difference Crossing Midnight - Excel. Formula is: 29:00 -23:00 results should be 6 hours. 16 minutes to 30 minutes = 1/2 hour 30. The general formula for time difference is . As a general rule of thumb, a change of 15° of longitude should result in a time difference of 1 hour. I need excel to perform something similar to what follows as my logic is the train is either early or late (as spot on time using either version of the. Calculating time without using time functions. increases by about 15° per hour, equal to one hour of R. Duration Process :6 hours. In Excel I have been trying to find an easier way to calculate a time difference where the times cross midnight. A. The ones that cross midnight on to the next day gives me headache because included in the raw data is the start date and start time for the next day's shift. In Excel I have been trying to find an easier way to calculate a time difference where the times. Calculating Time With 1/4, 1/2/ And 3/4 Of An Hour Increments - Excel. Start. Formula To Calculate Time Difference Crossing Midnight - Excel. The sun's position is irrelevant to when a star will be in its meridian; the Sun's coordinates in the RA/dec grid does change over the year. while i am able to identify when the shift crosses midnight, i am not able to correctly calculate the total number of hours, as 00:00 is tricky, and every formula i tried for hours before midnight, when applied to hours after midnight, throws everything off, and vice-versa. Do the normal end-time minus start_time, and then add either 0 or 1 back to it by checking if the start_time. The result in cell C1 should display the time difference as 9:00:00, indicating a. Formula To Calculate Time Difference Crossing Midnight - Excel. The result will be displayed in. Here's an example of how to calculate a time difference in Google Sheets: Start Time (A1): 8:00 AM. Time1 = CDate ("6:03:59 AM") Time2 =. Example: 3:00 - 5 hrs = -2 Be correct answer would be 22:00. Is there any formula to calculate Start time to End time with excluding lunch time? Here is example : Lunch time :12:00pm to 1:00pm. This approach rounds the result to the nearest whole number. In Excel I have been trying to find an easier way to calculate a time difference where the times. Time zones consist of a group of 24 spaces between lines of longitude that determine the local time between the lines. I have a loan with a variable beginning balance and irregular payments. Here 86400 is the total second in 24 hours and when you enter this formula it will return the difference in start and end time in seconds. 1. 1. Description (Result) 4 =INT((B2-A2)*24) Total hours between two times (4) 5 =(B2-A2)*1440. The simple formula shown above doesn't work if the start time is before midnight and the end time is after midnight. It wraps from 59 to 00 so the function correctly returns 1. Basically, we had to apply one of two formulas to compute variable right_hours_slept: (wake_time-bed_time)/3600 if bed_time is "at or after midnight. Note: Date information in time_text is ignored. Then it returns a negative value. each is less than 1, and that the duration is less than 24 hours. Using Microsoft SQL,. Calculate Total Hours Automatically Deducting Lunch Breaks - Excel. Get Difference in Seconds. Subtracting 30 Minutes From Time In And Out For Schedule - Excel. Each gets 30 minutes for breaks which is not paid. A. Set Time format to calculate average time. Hello everyone, I need some help. If I wanted to subtract two military times to get minutes what formula would I use. Steps: Type the below function in Cell D5. Orange line comes out through the data in column F from F30 onward. In order to use this calculator, you should enter the values of both specific time points in hours, minutes, and seconds. DAY function. An acceptable input has d, h, m, and s following each value, where d means days, h means hours, m means minutes, and s means seconds. The simplest and most obvious Excel formula to calculate time difference is this: = End time - Start time. Start Time (8:00am). etc. Note that I didn't use =E24*24, I used the original values. Note that according to this approximation cos i equals −1 when the semi-major axis. Hence, write down the below formula in the Formula Bar. m. summing the times and if you format as [h]:mm:ss. There are two approaches that you can take to present the results in the standard time format (hours : minutes : seconds). Press Enter. 000000. If this is the case, then you have two amounts to calculate. The MOD functions does not work if you use 24 hr / military clock, as it returns 17:30 instead of 06:30 between finish and start. Now; DateTime tomorrow = new DateTime (today. Start. I need to be able to determine if a time range intersects the other time range and by how much and then sum the total number of minutes of that intersection. How many years, days, or hours are there between one point in time in one time zone and another point in time in another time zone? Count Days Add Days Workdays Add Workdays Weekday Week №. Re: Calculating difference in time after midnight. A good thing to remember is that times are always a fraction of 1. @Johanb1185 ’s feedback - copied from duplicate : i am using 20:00 etc. Seconds in Google Sheets are calculated in the same manner as hours and minutes. Add the total hours to the total minutes (in hours and minutes): 6h + 1h 30m = 7 hours and 30 minutes, or 7:30 spent gardening. Formula To Calculate Time Difference Crossing Midnight - Excel. You will see the problem when you start. Start Time (8:00am). In Excel I have been trying to find an easier way to calculate a time difference where the times cross midnight. In astronomy and celestial navigation, the hour angle is the dihedral angle between the meridian plane (containing Earth's axis and the zenith) and. Example: Start time: 23:50:00 End time: 00:15:00 How would you formulate an equation to determine the duration of time or differnce between the start and end time? In Excel I have been trying to find an easier way to calculate a time difference where the times cross midnight. 46 minutes to 60 minutes = one hour. I need to subtract hours or minutes from a given time. In this approach, we assume we just need to compute the difference between the two dates as whole years, as is the case when you want to compute your age as at the last birthday. Duration Process :6 hours. Is there any formula to calculate Start time to End time with excluding lunch time? Here is example : Lunch time :12:00pm to 1:00pm. Calculate the Longitude in Time Units. Over 7 minutes to 15 minutes = 1/4 hour 15. After that, simply press Enter on your keyboard, and you will get 7:00 AM as the return of the subtraction formula. Hi all Here is my current formula for calcualting time. Start. with. Excel will now work as follows. In the third cell I enter this formula, =INT ( (C163-B163)*24). This is problematic from the view point that early morning times are less than the late times of. Therefore, dividing the (positive) difference of the SAS time values (i. Formula. You can get the correct difference in minutes using MOD function, e. Duration Process :6 hours. How do I calculate the time duration in minutes between two times when the first time is before midnight and the second time is after midnight by considering non work hours ? For example, need to calculate the work hours in minutes between 03/17/2021 07:00PM and 03/18/2021 9:30AM the next next. If Function In Time Range - Excel. Re: Calculate time up to midnight. The international date line (IDL) is an imaginary line that runs along the Earth's surface from the North Pole to the South Pole in the middle of the Pacific Ocean. 3. The World Clock – Current time all over the world. Format the cell containing the formula like this: Format > Number > More Formats > More date and time formats, delete "second" and :. For example, if you leave Los Angeles at 09:00 (9:00 am) and arrive in New York at 18:00 (6:00 pm), then the apparent traveling time is 9 hours. Local Nav Open Menu Local Nav Close Menu. Is there any formula to calculate Start time to End time with excluding lunch time? Here is example : Lunch time :12:00pm to 1:00pm. For example, to calculate hours between 9 PM and 3 AM: =MOD(0. To start the conversation again, simply ask a new question. It is flexible so it can also be used to normalize non-standard time values as well . This formula will help you calculate the hours difference between two times, even when the end time crosses midnight (Ex 7pm - 2am). In Excel I have been trying to find an easier way to calculate a time difference where the times cross midnight. Please see Creating a custom time format in Excel for the detailed steps. Next, right-click the cell, choose “Format Cells,” and pick “General. Assuming that cell B1 contains start time i. Is there any formula to calculate Start time to End time with excluding lunch time? Here is example : Lunch time :12:00pm to 1:00pm. mailrail: Excel Discussion (Misc queries) 3: April 18th 07 07:39 PM: Calculate hours and minutes between times when it goes past midnig: SC_Dave: Excel Worksheet Functions: 9: March 23rd 07 07:19 PM: formula to calculate time difference crossing midnight: ditorejax: Excel Worksheet Functions: 3: August 17th 06. =(MOD([@[Actual Time End]]-[@[Actual Time Start]],1))*24 This gives me the [Total Actual Time Hours] For the Actual Time End and Actual Time Start When the employee DIDN'T show up we entered 0 for both cells with the same cell format Number -> 2 decimal places. Duration Process :6 hours. I need to be able to work out the amount of worked time that fits into a certain time period. I cannot figure out the correct formula to complete this. To calculate time difference, we convert both time values to seconds since midnight using the following formula: time m = hh*3600 + mm*60. 1 Answer. New comments cannot be posted and votes cannot be cast. This chapter documents the principles of basic traffic signal timing at an intersection. For example, I need to subtract 20:22 (A1) from 20:54 (B1) and get 32 (for minutes) (C1) Also, would the formula be different crossing midnight. g. I need a formula to calculate Turn Around Time. DATEDIFF (date_part, date1, date2, [Start_of_week]) This calculation gives you more control over how date differences are computed in Tableau. In the next cell I enter the "end time", i. By creating a ‘standard’ time, aviators all have a reference point to work from. A minute is represented by an integer from 0 to 59 in the usual manner. Calculating Time After Midnight - Hi I am trying to make a formula for a work timesheet. =MOD (Time_Out - Time_In,1)*24. 30am-10pm. Spreadsheet Purpose: WORK HOURS per MTH with breaks & night time rate exta including Year Summary of Hours, Pay & Miles. Start. Formula To Calculate Time Difference Crossing Midnight - Excel. Start. Quang PT. Format cells to get average time. Add a comment. By G0liath02 in forum Excel General Replies: 13 Last Post: 11-04-2013, 02:30 AM. The formula would then be something like: =((arr. All three arguments are required: Start_date - the initial date of the period you want to calculate. I'm having a little challenge in a simple table trying to calculate time passed for example from: 22:00 to: 2:00 in the morning. Excel Formula Help To See If Time Falls Between Two Time. Write the formula in cell C2. Click OK and Time format will be set. The difference of the sidereal day to the mean solar day is. Example: Start time: 23:50:00 End time: 00:15:00 How would you formulate an equation to determine the duration of time or differnce between the start and end time? This formula will help you calculate the hours difference between two times, even when the end time crosses midnight (Ex 7pm - 2am) I am trying to calculate the number of minutes difference between times (times are military format) which sometimes cross over midnight. Start. = (A2A3)+A3-A2. I am a little confused with what you are after when you are stipulating. For example lets say on April 31st I have a time of 23:30 and on May 1st I have a time of 00:22. Currently is manual edit of total hours in Month. The Time Duration Calculator will calculate the time that has elapsed/difference between. Thank you for the quick reply bebo021999. You provide the start time, the end time, and the desired interval, and the INTCK function returns the difference in seconds, minutes, or hours. I have a function which is already compact, i wanted to know if there was better (like a DateTime functionality already included). Year, today. Day, 0, 0, 0). Hello everyone! I have to check whether an array of timestamps (half an hour between each timestamp) are within two time values, where it can occur that a set of two time values cross midnight. Show Printable Version;. The code is commented but I will also describe it here. Hour Difference. They will become Cell > Data Format > Automatic with Date and Time (Date None). Add or subtract hours, minutes or seconds to a given time using our time calculator. Example: End time = 1450, Start time = 1225. Start. Any time between these gets a fraction of 1. If all cells are formatted time then should be fine, also make sure you work out after midnight. In the Queries & Connections panel, right-click the “TimeWorked” query and select Reference. Most entries fall within the same day's 24 hour limit, so a simple forumla "=b1-a1" will do. This is very simple to do when the start and end time's are the same time zone, like in the. Formula To Calculate Time Difference Crossing Midnight - Excel. In Excel I have been trying to find an easier way to calculate a time difference where the times cross midnight. e.