Number Time Duration Calculator
Find the time between two clock times — even across midnight — or add and subtract durations for timesheets, shifts, and projects.
Time between two times
| Total minutes | — |
| Decimal hours | — |
Add / subtract durations
How it works
Between-times math converts both clock times to minutes since midnight; if the end time is earlier than the start, a full day (1,440 minutes) is added — that handles overnight shifts automatically. Duration arithmetic works in total minutes and converts back to hours and minutes.
Frequently asked questions
Does it handle overnight shifts?
Yes. A shift from 22:00 to 06:00 correctly returns 8 hours — end times earlier than the start are treated as the next day.
What are decimal hours for?
Payroll and billing usually use decimal hours: 8 hours 15 minutes = 8.25 hours. The converter gives you both formats.
Can I add more than two durations?
Add the first two, then use the result as Duration 1 with the next duration — or tally weekly hours in our freelance rate calculator.
⏱️ Billing by the hour?
Turn those hours into a rate with the freelance hourly rate calculator, or convert wages with the hourly-to-salary converter.