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Convert Seconds to Milliseconds

1 second = 1,000 milliseconds. Multiply the number of seconds by 1000.

Result
1,000

1 s = 1,000 ms

Multiply the number of seconds by 1000.

Results are rounded for display. Double-check values for critical work.

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Popular time conversions

Seconds to Milliseconds table

SecondsMilliseconds
1 s1,000 ms
2 s2,000 ms
3 s3,000 ms
4 s4,000 ms
5 s5,000 ms
10 s10,000 ms
20 s20,000 ms
25 s25,000 ms
50 s50,000 ms
100 s100,000 ms
500 s500,000 ms
1000 s1,000,000 ms

About these units

The second (s) is an SI base or derived unit of time.

The millisecond (ms) is a unit of time, equal to 0.001 seconds.

Going the other way, 1 millisecond = 0.001 seconds. Time conversions look trivial until months and years appear — a month is not 30 days and a year is not 365. This converter uses the astronomical averages (30.44 days and 365.2425 days) so long-range answers stay accurate.

Frequently asked

How many milliseconds are in a second?
1 second = 1,000 milliseconds.
How do you convert seconds to milliseconds?
Multiply the number of seconds by 1000.
What is 10 s in ms?
10 s = 10,000 ms.

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