How to measure elapsed time
Enter both dates and both times.
1
Set the start
Choose the start date and a decimal 24-hour time.
2
Set the end
Choose the end date and time; use the next day for overnight spans.
3
Read the duration
The result shows days, hours and minutes plus decimal hours.
What does this tool do?
Elapsed time is the difference between two instants, expressed in days, hours and minutes. Enter each date with a decimal 24-hour time, such as 9.5 for 09:30 and 17.25 for 17:15.
The Formula
Elapsed = End date and time − Start date and timeFrequently Asked Questions
Can the end time be earlier than the start time?
Only by using a later end date. For an overnight period, set the end date to the following day; an end instant before the start returns no result.
Why are the total hours shown with decimals?
Decimal hours are useful for timesheets: 1.5 hours is 1 hour 30 minutes. The main result keeps the days, hours and minutes form.