About the Duration Calculator
What is the Duration Calculator?
This duration calculator measures the exact time between a start and an end moment, including the time of day.
It is handy for travel time, machine running hours, billing hours or event lengths spanning several days.
How to use the Duration Calculator
- Start (Date and Time) (sample: 2026-10-22T09:15)
- End (Date and Time) (sample: 2026-10-23T17:45)
- Press Calculate Duration (results also refresh as you type). The result card shows the Duration, along with Total hours (decimal), Total hours and minutes, Total minutes and Total seconds.
Formula used
Duration = End date-time − Start date-time
- Decimal hours = total minutes ÷ 60
Worked example
These are the sample values already filled in the calculator above, and the result it returns for them:
| Input | Sample value |
|---|---|
| Start (Date and Time) | 2026-10-22T09:15 |
| End (Date and Time) | 2026-10-23T17:45 |
| Result | Value |
|---|---|
| Duration | 1 day, 8 hours, 30 minutes |
| Total hours (decimal) | 32.5 |
| Total hours and minutes | 32:30 |
| Total minutes | 1,950 |
| Total seconds | 1,17,000 |
| Total days (decimal) | 1.354 |
| Direction | Forward |
Tips for using the Duration Calculator
- For timesheets, decimal hours (32.5) are easier to multiply by an hourly rate than 32:30.
- For dates only, the date difference calculator also gives weekdays.