Milliseconds to Seconds
A millisecond is one thousandth of a second, the typical resolution for app response times and animation frames. The second is the SI base unit of time, defined by the oscillation frequency of a cesium-133 atom. 1 ms equals 0.001 s, so converting between them is a matter of multiplying by that fixed factor — type any value into the converter below and both sides update instantly as you type.
Both units belong to time, measured here against time's base unit (s) — every other time unit on this site converts through that same reference point, which is why the table below can also be read as a quick cross-check against nearby values.
Formula
s = ms × 0.001
ms = s × 1,000
Worked example: 5 ms × 0.001 = 0.005 s.
Conversion table
| Millisecond (ms) | Second (s) |
|---|---|
| 1 ms | 0.001 s |
| 2 ms | 0.002 s |
| 3 ms | 0.003 s |
| 5 ms | 0.005 s |
| 10 ms | 0.01 s |
| 20 ms | 0.02 s |
| 25 ms | 0.025 s |
| 50 ms | 0.05 s |
| 100 ms | 0.1 s |
| 250 ms | 0.25 s |
| 500 ms | 0.5 s |
| 1,000 ms | 1 s |
Frequently asked
- How many Seconds in a millisecond?
- 1 ms equals 0.001 s.
- How do I convert Milliseconds to Seconds?
- Multiply the value in ms by 0.001 to get s. The converter above does this instantly as you type.
- Is the conversion exact?
- Yes — Millisecond and Second are both defined by a fixed conversion factor to time's base unit (s), so the result shown is exact to the precision displayed, not an approximation.