⏱️Time Calculator
Add or subtract time from a time of day, or calculate the difference between two times. Supports both 24h and 12h notations. Useful for predicting meeting end times, flight arrivals, work-hour reconciliation, and combining cooking timers.
🔒 Browser-based✓ No watermark✓ No signup
How to use
- 1Pick a mode (add/subtract/difference).
- 2Type values for instant results.
FAQ
Down to seconds?+
Yes — hours, minutes, and seconds all supported.
Does it handle crossing midnight?+
Yes — 23:00 + 3h = 2:00 the next day. Results include a '+1 day' indicator.
What about multi-day differences?+
This tool is for within-a-day time. For multi-day periods, use the [D-Day Calculator].
Can I use it for work-hour reconciliation?+
Use 'difference' mode for clock-in/clock-out. To exclude a 1-hour lunch, subtract 1:00 from the difference.
AM/PM notation?+
Both 24-hour (15:30) and 12-hour (3:30 PM) are supported. Pick the format next to each input field.