Convert seconds to milliseconds
Converting seconds to milliseconds is a common time task, whether you are checking a recipe, a spec sheet, a travel distance or a homework problem. Since 1 s equals 1,000 ms, 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 seconds to milliseconds
To convert seconds to milliseconds, multiply the number of seconds by 1,000. For example, 10 s × 1,000 = 10,000 ms.
ms = s × 1,000
- Write down the value in seconds you want to convert.
- Multiply it by 1,000 (the exact s→ms factor).
- The result is your value in milliseconds. Check it below with the converter or the table.
Conversion table
Common values of seconds and their equivalents in milliseconds:
| s | ms |
|---|---|
| 1 | 1,000 |
| 2 | 2,000 |
| 3 | 3,000 |
| 4 | 4,000 |
| 5 | 5,000 |
| 10 | 10,000 |
| 20 | 20,000 |
| 25 | 25,000 |
| 50 | 50,000 |
| 100 | 100,000 |
| 250 | 250,000 |
| 500 | 500,000 |
About these units
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.
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.
Frequently asked questions
How do I convert seconds to milliseconds?
To convert seconds to milliseconds, multiply the number of seconds by 1,000. For example, 10 s × 1,000 = 10,000 ms. Or skip the math: type the value into the converter at the top of this page and the result updates instantly.
How many milliseconds are in 1 second?
1 s = 1,000 ms. That is the fixed relationship used by this converter and by international standards.
How many seconds are in 1 millisecond?
1 ms = 0.001 s. If you are converting in the opposite direction, use our Millisecond to Second converter for the dedicated table and FAQ.
Is the seconds to milliseconds conversion exact?
Yes. Both units are defined by international agreement, so the factor of 1,000 is exact. Displayed results are rounded to 6 significant digits only for readability.
What is second used for?
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.