To display the result as a regular number, apply the General or Number format. When you multiply a time value by 86400, Excel may automatically format the result using a time format like h:mm, which will display the value incorrectly. The Excel time 6:00 converts to 21,600 seconds. With the time value 6:00 cell A1, you can visualize the conversion like this: =A1*(24*60*60) This means times and hours are fractional values of 1, as shown in the table below: Hoursīecause each hour can be represented as 1/24, you can convert an Excel time into decimal hours by multiplying the value by 24, convert to decimal minutes by multiplying the value by 1440 (24 * 60), and convert to seconds by multiplying by 86400 (24 * 60 * 60). TEXT(A1,'HHMM') In the format argument, you have the HHMM format which is without a colon and shows the time as military time. Now by using the text function, you can convert this time into military time and the formula would be as follows. If you don't use the brackets, Excel will simply "roll over" when the duration hits 24 hours (like a clock).In the Excel time system, one 24-hour day is equal to 1. The first time is in AM and the second is in PM. In cases where calculated time may exceed 24 hours, you should use a custom format like :mm. The square bracket syntax tells Excel to display hour durations of greater than 24 hours. To remove the AM/PM, apply a custom number format like: h:mm For example, if you have a calculated time of 6 hours, Excel may display this as 6:00 AM. Formatting time durationsīy default, Excel may display time, even time that represents a duration, using AM/PM. This formula will correctly calculate the hours between two times in a single day, or over multiple days. The result is formatted with the custom number format: :mm In the screen below, start and end values contain both dates and times, and the formula is simply: =C5-B5 // end-start The numbers to the right of the decimal represent the time component of the date. Once you have datetime values, you can use a basic formula to calculate elapsed time. If you format this date with General format, you'll see a value like this: 42614.4166666667 // date + time To enter a date and time together, use a single space between time and date like this: 10:00. Most of the work in this formula is done by the TEXT function, which applies a custom number format for hours and minutes to a value created by subtracting the start date from the end date. You can simply the problem of calculating elapsed time drastically using values that contain both date and time, sometimes called "datetimes". If you need this, see the date + time option below.įor more on modulo, here's a good link on Khan Academy. Note: neither formula above will handle durations greater than 24 hours. Because this formula will handle times in the same day and times that span midnight, we don't need a conditional IF statement. This formula takes care of the negative time by using the MOD function to "flip" negative values to the required positive value. By using the MOD function with a divisor of 1, we can create a formula to handle both situations: =MOD(end-start,1) The MOD function provides an elegant way to simply the formula above. But when the times across a day boundary the second formula is used. When both times are in the same day, end is greater than start time, the simple formula is used. This formula won't work for times that occur the same day, so we need to use IF function like this: =IF(end>start, end-start, 1-start+end) To correct this problem, you can use this formula for times that cross a day boundary: =1-start+endīy subtracting the start time from 1, you get the amount of time in the first day, which you can simply add to the amount of time in the 2nd day, which is the same as the end time. For example, if the start time is 10:00 PM one day, and the end time is 5:00 AM the next day, the end time is actually less than the start time and the formula above will return a negative value, and Excel will display a string of hash characters (#). This means times and hours are fractional values of 1, as shown in the table below: HoursĬalculating elapsed time is more tricky if the times cross a day boundary (midnight). In Excel, one day equals 1, which represents 24 hours. However, when times cross a day boundary (midnight), things can get tricky. To see the result in hours and minutes, apply a time number format like this: h:mm For example, with start time of 9:00 AM and an end time of 5:00 PM, you can simply use this formula: =end-start When start time and end time occur in the same day, calculating duration in hours is straightforward. This article provides several formula solutions, depending on the situation. This is because times that cross midnight often have a start time that is later than the end time (i.e. The complexity of calculating the number of hours between two times stems from times that cross midnight.
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