Add Time Calculator
Add two or more times together — 2h 45m plus 1h 30m equals 4h 15m — with the decimal-hours total shown as well.
Result
- Total
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- Decimal Hours
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Calculations happen in your browser. The times you enter are never uploaded and are not sent to analytics.
How Time Addition Works
Durations are converted to whole seconds before adding, and the result is converted back to hours and minutes. That is why minutes can carry over correctly: 2h 45m + 1h 30m = 4h 15m, not 3h 75m.
Project and Timesheet Use
Adding time is useful for summing a week of small tasks, combining meeting lengths, or totalling several work sessions before filling in a timesheet. The decimal total lets you transfer the number directly into payroll software.
Frequently Asked Questions
Can I add more than two durations?
Yes — keep adding rows; every non-empty row is included in the total.
Does it support seconds?
Yes, seconds can be included in the duration text, for example “1h 15m 30s”.
What if I need subtraction?
Use the subtract time calculator for differences, including negative results.