KPH to m/s
Kilometers per hour to meters per second: 1 km/h = 0.27778 m/s. Formula, a 12-row reference table, worked examples and the reverse conversion.
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Formula for converting kilometers per hour into meters per second
The unit table behind the converter relates kilometers per hour and meters per second through one ratio, and that ratio works out to 0.27777778. In other words, 1 km/h = 0.27777778 m/s.
The ratio works in both directions: multiply by 0.27777778 to go from kilometers per hour to meters per second, or multiply by 3.6 to go from meters per second back to kilometers per hour.
Quick lookup: kilometers per hour in meters per second
This lookup list shows 12 km/h values and what they become in m/s. The step from one row to the next is not constant, but the ratio of 0.27777778 between the columns is.
| Kilometers per hour (km/h) | Meters per second (m/s) |
|---|---|
| 0.5 | 0.13888889 |
| 1 | 0.27777778 |
| 2 | 0.55555556 |
| 5 | 1.388888889 |
| 10 | 2.777777778 |
| 20 | 5.555555556 |
| 25 | 6.944444444 |
| 50 | 13.88888889 |
| 100 | 27.77777778 |
| 250 | 69.44444444 |
| 500 | 138.8888889 |
| 1,000 | 277.7777778 |
Values in the m/s column are shown the way the converter shows them, with a limited number of significant digits.
Worked examples for kilometers per hour to meters per second
Example 1. Start with 120 km/h. Multiply 120 by 0.27777778 and the converter shows 33.33333333 m/s.
Try 75 km/h as well. Multiplying by 0.27777778 gives 20.83333333 m/s, which the reverse ratio 3.6 maps back to 75 km/h.
Finally, convert 85 meters per second to kilometers per hour: dividing by 0.27777778 gives 306.
The reverse: meters per second to kilometers per hour
There is no separate page for meters per second to kilometers per hour, but the swap button in the converter above flips the direction. For that direction 1 m/s = 3.6 km/h.
For other combinations, the Speed Converter offers every unit in one pair of dropdowns.
Other conversions in this family
These pages cover neighbouring unit pairs from the same converter.
Frequently asked questions
How many m/s make up 1 km/h?
1 km/h = 0.27777778 m/s in the converter's unit table. Multiplying by 10 gives 2.777777778 m/s; multiplying by 100 gives 27.77777778 m/s.
What is 1 m/s in km/h?
One meter per second equals 3.6 kilometers per hour. Ten meters per second equal 36 kilometers per hour.
How do I convert 240 km/h to m/s?
240 kilometers per hour is 66.66666667 meters per second. The calculation is 240 multiplied by 0.27777778, rounded the way the widget rounds.
How does the converter round results?
The widget calculates with ordinary floating-point numbers and only rounds what it displays. Results of 1 or more show up to 10 significant digits, results below 1 show up to 8, and results from 1,000 upward show up to 6 decimal places with thousands separators. As an example, 0.123456789 km/h displays as 0.034293552 m/s and 1,234.5678 km/h displays as 342.9355 m/s.
Where does the km/h to m/s result come from?
Behind the scenes, kilometers per hour and meters per second are each tied to the same base unit by a stored factor. The ratio of those factors, 0.27777778, is what turns an km/h value into a m/s value.
What is the reverse of km/h to m/s?
Reversing the pair: multiply by 3.6, or equivalently divide by 0.27777778. Press the swap button in the widget above, or choose m/s as the "From" unit. Example: 25 m/s = 90 km/h.
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