Convert milliseconds to seconds
Converting milliseconds to seconds is a common time task, whether you are checking a recipe, a spec sheet, a travel distance or a homework problem. Since 1 ms equals 0.001 s, the math is a single multiplication — and this page does it for you instantly, with the formula, a table of common values and answers to the questions people ask most.
Exact factor
How to convert milliseconds to seconds
To convert milliseconds to seconds, multiply the number of milliseconds by 0.001. For example, 10 ms × 0.001 = 0.01 s.
s = ms × 0.001
- Write down the value in milliseconds you want to convert.
- Multiply it by 0.001 (the exact ms→s factor).
- The result is your value in seconds. Check it below with the converter or the table.
Conversion table
Common values of milliseconds and their equivalents in seconds:
| ms | s |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 3 | 0.003 |
| 4 | 0.004 |
| 5 | 0.005 |
| 10 | 0.01 |
| 20 | 0.02 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 250 | 0.25 |
| 500 | 0.5 |
About these units
Millisecond (ms). A millisecond is one thousandth of a second, the typical scale of computer response times and camera flashes. Network latency and frame durations are measured in milliseconds.
Second (s). The second is the SI base unit of time, defined by the cesium-133 atomic transition frequency of 9,192,631,770 hertz. It is the foundation of all time measurement.
Frequently asked questions
How do I convert milliseconds to seconds?
To convert milliseconds to seconds, multiply the number of milliseconds by 0.001. For example, 10 ms × 0.001 = 0.01 s. Or skip the math: type the value into the converter at the top of this page and the result updates instantly.
How many seconds are in 1 millisecond?
1 ms = 0.001 s. That is the fixed relationship used by this converter and by international standards.
How many milliseconds are in 1 second?
1 s = 1,000 ms. If you are converting in the opposite direction, use our Second to Millisecond converter for the dedicated table and FAQ.
Is the milliseconds to seconds conversion exact?
Yes. Both units are defined by international agreement, so the factor of 0.001 is exact. Displayed results are rounded to 6 significant digits only for readability.
What is millisecond used for?
A millisecond is one thousandth of a second, the typical scale of computer response times and camera flashes. Network latency and frame durations are measured in milliseconds.