Time Duration Calculator - Add & Subtract Time
Add or subtract multiple hour-and-minute durations, then see the normalized total and total minutes with this free online time calculator.
TIME DURATION CALCULATOR
Add and subtract multiple hour-and-minute entries to total a timesheet, project log, exercise plan, travel itinerary, or media playlist.
Each row can be positive or negative, and the total updates immediately in normalized hours and minutes as well as total minutes.
Add a row for each hour-and-minute entry and set it to add or subtract. The running total normalizes into hours and minutes and is repeated as total minutes, which is the form most timesheets and invoices expect.
Rows hold plain durations rather than clock times, so no overtime rule, unpaid-break deduction, rounding policy, or working-day length is applied. Minutes above 59 carry into hours, and rows accept hours and minutes only; use the date-and-time comparison when you need seconds.
Worked examples: Adding 1 hour 45 minutes and 2 hours 30 minutes gives 4 hours 15 minutes, or 255 total minutes — Subtracting 30 minutes from 9 hours 20 minutes leaves 8 hours 50 minutes, or 530 total minutes. Eight entries of 45 minutes each add up to 6 hours — A 90-minute meeting and a 2 hour 40 minute call total 4 hours 10 minutes.
Frequently Asked Questions
- Can I subtract time?
- Yes. Toggle any row from plus to minus to subtract its hours and minutes from the running total.
- Can I add more than two time entries?
- Yes. Add more rows for every shift, task, clip, or duration you need to total.
- Can the total be negative?
- Yes. If subtracted durations exceed added durations, the total is shown with a minus sign.
- Can I enter more than 59 minutes?
- Yes. The calculator converts each entry to minutes and normalizes the final result, so 90 minutes contributes the same duration as 1 hour 30 minutes. Use whole-number inputs; decimal parts are not included.
- How many minutes are in 2 hours 30 minutes?
- 2 hours 30 minutes is 150 minutes. Multiply the hours by 60 and add the minutes.
- How do I add times over 24 hours?
- Add every row in minutes, then divide by 60 to get hours. For example, 20 hours 45 minutes plus 6 hours 30 minutes is 27 hours 15 minutes.