Convert km/h to m/s
1 km/h = 0.277778 m/s · 1 m/s = 3.6 km/h · Exact by definition
1 km/h = 0.277778 m/s
The same value in other units
- mile per hour
- 0.621371 mph
- knot
- 0.539957 kn
- minutes per kilometre
- 60 min/km
Settings
Digits kept in the answer. Automatic keeps six, which hides floating-point noise without losing anything real.
Convert a whole list
Paste one conversion per line, written the way you would say it: "5 km to mi". Handy for a column copied out of a spreadsheet.
Speed and pace
km/h to m/s: conversion table
| kilometre per hour | metre per second |
|---|---|
| 1 km/h | 0.277778 m/s |
| 2 km/h | 0.555556 m/s |
| 3 km/h | 0.833333 m/s |
| 5 km/h | 1.38889 m/s |
| 10 km/h | 2.77778 m/s |
| 20 km/h | 5.55556 m/s |
| 25 km/h | 6.94444 m/s |
| 50 km/h | 13.8889 m/s |
| 100 km/h | 27.7778 m/s |
| 250 km/h | 69.4444 m/s |
| 500 km/h | 138.889 m/s |
| 1000 km/h | 277.778 m/s |
| metre per second | kilometre per hour |
|---|---|
| 1 m/s | 3.6 km/h |
| 2 m/s | 7.2 km/h |
| 3 m/s | 10.8 km/h |
| 5 m/s | 18 km/h |
| 10 m/s | 36 km/h |
| 20 m/s | 72 km/h |
| 25 m/s | 90 km/h |
| 50 m/s | 180 km/h |
| 100 m/s | 360 km/h |
| 250 m/s | 900 km/h |
| 500 m/s | 1800 km/h |
| 1000 m/s | 3600 km/h |
How the conversion works
m/s = km/h × 0.27777778
Both units are defined exactly, so the precision of the km/h to m/s result depends only on the number of decimal places you choose.
METHOD AND SOURCES
Where the conversion factors come from
Results are calculated from the unit definitions stored in the converter, not copied from a lookup table. For exact units, every value in the table follows from the same factor shown in the formula above.
- BIPM — SI Brochure
The official definitions of the International System of Units (SI).
- NIST SP 811 — Conversion factors
Conversion-factor tables for SI and non-SI units.
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