How to convert milliseconds to seconds
To convert a measurement in milliseconds to seconds, multiply the value by 0.001. The conversion factor comes from the relationship between both units and the second.
For example, to convert 5 ms to seconds: 5 × 0.001 = 0.005 s.
What is a millisecond?
A millisecond is one thousandth of a second (0.001 s). There are 1,000 milliseconds in one second. The millisecond became a practical everyday unit with the rise of digital electronics and computing, where events on this timescale (network pings, screen refreshes) directly affect user experience.
Common uses of milliseconds include: Network latency and ping times; Display refresh and input response times; Camera shutter speeds; Audio processing and synchronization.
What is a second?
A second is the SI base unit of time, defined by the radiation period of the caesium-133 atom (9,192,631,770 cycles). Historically defined as 1/86,400 of a mean solar day, the second was redefined in 1967 using atomic clocks, making it one of the most precisely realized units in all of science.
Common uses of seconds include: Scientific timing and physics experiments; Sports timing and lap records; Computing timeouts and latency measurements; Everyday stopwatch and countdown timing.
Milliseconds to seconds worked examples
Here are some common values converted:
1 ms = 0.001 s 5 ms = 0.005 s 10 ms = 0.01 s 50 ms = 0.05 s 100 ms = 0.1 s
Frequently asked questions
How many seconds are in one millisecond?
One millisecond (ms) equals 0.001 seconds (s). Multiply any value in milliseconds by 0.001 to convert to seconds.
How do I convert milliseconds to seconds?
Multiply the value in milliseconds by 0.001. For example, 5 ms × 0.001 = 0.005 s.
How do I convert seconds to milliseconds?
Multiply the value in seconds by 1,000, or divide by 0.001. Use the swap button on the converter above to reverse the direction.
Is the millisecond to second conversion exact?
Fixed units (second through week) are exact. Month and year use the average Gregorian calendar length (30.44 and 365.2425 days) since these vary in practice.
What is the formula for milliseconds to seconds?
The formula is: s = ms × 0.001. This comes from the definition of both units relative to the second.