Time Unit Converter
Convert between time units — milliseconds, seconds, minutes, hours, days and weeks. Pick any two units; it runs entirely in your browser, with exact conversion factors.
Time conversions come up constantly — turning an API timeout in milliseconds into minutes, working out how many seconds are in an hour, or planning a duration in days and weeks. All factors here are exact (1 second = 1,000 ms, 1 minute = 60 s, 1 hour = 3,600 s, 1 day = 86,400 s, 1 week = 604,800 s), so the live tool and the numbers in every page below always agree.
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Units in this converter
| Unit | What it is |
|---|---|
| Nanosecond (ns) | A nanosecond is one-billionth of a second (1 s = 1,000,000,000 ns) — the timescale of CPU clock cycles and memory access. |
| Microsecond (µs) | A microsecond is one-millionth of a second (1 s = 1,000,000 µs; 1 ms = 1,000 µs) — used for high-resolution timers and signal timing. |
| Millisecond (ms) | A millisecond is one-thousandth of a second (1 s = 1,000 ms) — the unit for web-page load times, API timeouts, ping/latency and animation frames. |
| Second (s) | The second is the SI base unit of time. Everyday durations, timeouts and stopwatch readings are usually measured in seconds. |
| Minute (min) | A minute is 60 seconds — the common unit for short everyday durations. |
| Hour (hr) | An hour is 60 minutes (3,600 seconds) — the standard unit for scheduling and work. |
| Day (day) | A day is 24 hours (86,400 seconds) — one full calendar day. |
| Week (wk) | A week is 7 days (604,800 seconds). |
We deliberately leave out "month" and "year" here: their length varies (28–31 days; 365 or 366 days), so a single fixed factor would be misleading. For those, see how many minutes are in a month (with a leap-year-aware per-month calculator) and how many seconds are in a year (31,536,000, or 31,622,400 in a leap year), or use a date-difference calculator that accounts for the actual calendar.