Milliseconds: conversions & definition
A millisecond equals one thousandth of a second. This measures elapsed duration, such as response time, rather than a clock time or a time-zone offset.
Choose the unit you need
Each row converts one ms. Open a converter to enter any value and see its formula, worked example and reference table. Results below are rounded to 10 significant digits.
| Convert to | Equivalent value | Calculator |
|---|---|---|
| Seconds (s) | ≈ 0.001 | Convert ms to s |
| Minutes (min) | ≈ 0.00001666666667 | Convert ms to min |
| Hours (h) | ≈ 2.777777778e-7 | Convert ms to h |
| Days (d) | ≈ 1.157407407e-8 | Convert ms to d |
| Weeks (wk) | ≈ 1.653439153e-9 | Convert ms to wk |
| Kiloseconds (ks) | ≈ 0.000001 | Convert ms to ks |
| Microseconds (µs) | ≈ 1,000 | Convert ms to µs |
| Megaseconds (Ms) | ≈ 1e-9 | Convert ms to Ms |
| Nanoseconds (ns) | ≈ 1,000,000 | Convert ms to ns |
| Gigaseconds (Gs) | ≈ 1e-12 | Convert ms to Gs |
| Centiseconds (cs) | ≈ 0.1 | Convert ms to cs |
| Deciseconds (ds) | ≈ 0.01 | Convert ms to ds |
| Hectoseconds (hs) | ≈ 0.00001 | Convert ms to hs |
| Decaseconds (das) | ≈ 0.0001 | Convert ms to das |
| Picoseconds (ps) | ≈ 1,000,000,000 | Convert ms to ps |
| Teraseconds (Ts) | ≈ 1e-15 | Convert ms to Ts |
| Femtoseconds (fs) | ≈ 1e+12 | Convert ms to fs |
| Petaseconds (Ps) | ≈ 1e-18 | Convert ms to Ps |
| Attoseconds (as) | ≈ 1e+15 | Convert ms to as |
| Exaseconds (Es) | ≈ 1e-21 | Convert ms to Es |
| Zeptoseconds (zs) | ≈ 1e+18 | Convert ms to zs |
| Zettaseconds (Zs) | ≈ 1e-24 | Convert ms to Zs |
| Yoctoseconds (ys) | ≈ 1e+21 | Convert ms to ys |
| Yottaseconds (Ys) | ≈ 1e-27 | Convert ms to Ys |
Keep the quantity consistent
Choose units that represent the same quantity and preserve the measurement conditions. A scale conversion changes the number and unit together; it does not change the physical amount or improve the accuracy of your measurement.
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