Seconds to Milliseconds Converter
Convert seconds to milliseconds instantly. 1 s = 1,000 ms. Free two-way converter with the formula and a quick reference table.
How to convert seconds to milliseconds
milliseconds = seconds × 1,000
One second equals 1,000 milliseconds, so to convert seconds to milliseconds you multiply by 1,000. Going the other way, one millisecond is 0.001 seconds. Both units measure time, so the conversion is an exact ratio that never changes.
10 seconds = 10,000 milliseconds. Multiply your second figure by the factor above (or just type it into the box) to convert any amount.
seconds to milliseconds table
| seconds (s) | milliseconds (ms) |
|---|---|
| 1 | 1,000 |
| 2 | 2,000 |
| 3 | 3,000 |
| 5 | 5,000 |
| 10 | 10,000 |
| 20 | 20,000 |
| 25 | 25,000 |
| 50 | 50,000 |
| 100 | 100,000 |
| 250 | 250,000 |
| 500 | 500,000 |
| 1,000 | 1,000,000 |
Frequently asked questions
How many milliseconds are in a second?
One second equals 1,000 milliseconds. So to convert, multiply the number of seconds by 1,000.
How do I convert seconds to milliseconds?
Multiply by 1,000, or simply enter the value in the converter above — it does the math instantly and works both ways.
Is this conversion exact?
Yes — both units measure the same quantity, so the ratio is fixed and this uses the standard internationally-agreed factor.