Seconds to Milliseconds
The second is the SI base unit of time, defined by the oscillation frequency of a cesium-133 atom. A millisecond is one thousandth of a second, the typical resolution for app response times and animation frames. 1 s equals 1,000 ms, 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
ms = s × 1,000
s = ms × 0.001
Worked example: 5 s × 1,000 = 5,000 ms.
Conversion table
| Second (s) | Millisecond (ms) |
|---|---|
| 1 s | 1,000 ms |
| 2 s | 2,000 ms |
| 3 s | 3,000 ms |
| 5 s | 5,000 ms |
| 10 s | 10,000 ms |
| 20 s | 20,000 ms |
| 25 s | 25,000 ms |
| 50 s | 50,000 ms |
| 100 s | 100,000 ms |
| 250 s | 250,000 ms |
| 500 s | 500,000 ms |
| 1,000 s | 1,000,000 ms |
Frequently asked
- How many Milliseconds in a second?
- 1 s equals 1,000 ms.
- How do I convert Seconds to Milliseconds?
- Multiply the value in s by 1,000 to get ms. The converter above does this instantly as you type.
- Is the conversion exact?
- Yes — Second and Millisecond 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.