Time Calculator & Time Addition Tool
Free online time calculator. Add or subtract time values in days, hours, minutes, and seconds. Calculate time expressions and add time to any date. No upload required.
Add or Subtract Time
Result
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Add/Subtract Time from Date
Result Date & Time
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Time Expression Calculator
Use d(days), h(hours), m(minutes), s(seconds). Example: 1d 2h 30m + 3h 45m - 30s
Result
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Time Units Reference
Common Time Conversions
| Unit | Equivalent |
|---|---|
| 1 Day | 24h / 1,440m / 86,400s |
| 1 Hr | 60m / 3,600s |
| 1 Min | 60s |
| 1 Week | 7d / 168h / 10,080m |
Expression Syntax
d - Days
h - Hours
m - Minutes
s - Seconds
Example: 1d 2h 30m + 45m - 10s