Time Duration Calculator (Add & Subtract Time)
Add or subtract lists of hours and minutes — like 1:30 + 2:45 − 0:20 — and get the total in h:mm, decimal hours and days.
How to use
- 1Enter one duration per line (1:30, 2h 15m, 90m). Start a line with - to subtract it.
- 2Read the total as hours and minutes, decimal hours and days.
Frequently asked questions
Which formats can I use?
1:30 (hours:minutes), 1:30:15 (with seconds), 1h 30m, 90m, 1.5h or 2d 3h. Plain numbers are read as minutes.
How do I subtract time?
Put a minus sign in front of the line, e.g. -0:45 to take away a 45-minute break.
How do I add up a week of timesheet hours?
Enter each day's hours on its own line — the total appears in hours and minutes and as decimal hours for payroll.