Speed converters
Speed (or strictly velocity, with direction) is distance per unit time. The SI unit is meters per second (m/s), but kilometers per hour (km/h) and miles per hour (mph) dominate everyday road signs. All factors here are exact: 1 km/h = 1/3.6 m/s, 1 mph = 0.44704 m/s, 1 knot = 1852/3600 m/s.
Popular speed conversions
All speed units
The 5 units below can be selected as source or target inside any speed converter.
- Meters per secondm/s · Metric
- Kilometers per hourkm/h · Metric
- Miles per hourmph · Imperial
- Feet per secondft/s · Imperial
- Knotskn · Other
Speed units in terms of the meter per second
Every speed unit on Convertitive is defined as an exact ratio of the meter per second (m/s), the reference unit for this category. The table below shows what one of each unit equals in meters per second — the constant every converter on this page is built from.
| Unit | Symbol | 1 unit in meters per second |
|---|---|---|
| Meters per second | m/s | base unit |
| Kilometers per hour | km/h | 0.277778 m/s |
| Miles per hour | mph | 0.44704 m/s |
| Feet per second | ft/s | 0.3048 m/s |
| Knots | kn | 0.514444 m/s |
To convert between any two units, Convertitive scales the input to meters per second using these factors and then back out to the target unit — so every result on this page traces to a single, exact definition rather than a chained approximation. Pick any pair above to see the formula, a 50-row reference table, and worked examples.
Meters per second to kilometers per hour reference table
Common meters per second values with their kilometers per hour equivalent, computed with the same factors the converter uses.
| m/s | km/h |
|---|---|
| 1 | 3.6 |
| 5 | 18 |
| 10 | 36 |
| 20 | 72 |
| 32 | 115.2 |
| 50 | 180 |
| 75 | 270 |
| 95 | 342 |
| 140 | 504 |
| 200 | 720 |
| 350 | 1260 |
| 1000 | 3600 |
Need a value that is not listed? Open the m/s to km/h converter and type any number.