Add or subtract hours, minutes, and seconds. Convert between time formats. Calculate time differences. Free online time calculator.
Unlike the decimal system that governs our currency, time is calculated using a Sexagesimal (Base-60) system inherited from the ancient Babylonians.
The number 60 is a Superior Highly Composite Number with 12 factors, allowing an hour to be easily divided into halves, thirds, quarters, and fifths without recurring decimals.
| Unit | Equivalent (Sec) |
|---|---|
| Minute | 60 |
| Hour | 3,600 |
| Day | 86,400 |
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Aggregated Temporal Interval