Meters per second to Kilometers per hour Converter

The converter above is already set to meters per second and kilometers per hour, so you only need to enter your number. The result updates as you type, and nothing is sent anywhere.

1. Type your value in the Value box, for example 10. Decimals and negative numbers are accepted.
2. Check that From shows meters per second and To shows kilometers per hour. Both menus can be changed if you need a different pair.
3. Read the answer in the large result box. The note under it shows the exact factor used for one meter per second.
4. Press Copy result to put the answer on your clipboard, or Swap units to convert in the opposite direction.
5. Look at In every unit on the right to see the same amount in all the other speed units.

One meter per second is exactly 3.6 kilometers per hour, so the formula is kilometers per hour = meters per second x 3.6. Going the other way, one kilometer per hour is about 0.277778 meters per second. Meters per second is the SI unit of speed and is common in physics and weather data. One kilometer per hour is 0.2778 meters per second, since 3.6 kilometers per hour make one meter per second.

Worked examples with the same factor:

• 10 meters per second: 10 x 3.6 = 36 kilometers per hour
• 25 meters per second: 25 x 3.6 = 90 kilometers per hour
• 100 meters per second: 100 x 3.6 = 360 kilometers per hour

Multiply by 3.6: 10 m/s is exactly 36 km/h.

To check the converter by hand, take 25 meters per second and apply the rule once: the result should be 90 kilometers per hour. If you go back again with the reverse factor 0.277778 you land on 25 meters per second, which confirms that the two directions agree. Rounding the factor to fewer digits for mental math gives a result that is close but not identical, so use the tool when the last digits matter.

These reference values come from the same factor the converter uses, so they match what you see above. Use the table for common amounts, and the converter for anything else.

Speed is distance divided by time, so a speed conversion changes both a length unit and a time unit at once. Miles per hour and kilometers per hour differ only in the length part, while meters per second also changes the time part, which is why the factor of 3.6 appears between them. Knots add a third system based on the nautical mile, which is tied to one minute of latitude.

Use the table as a sanity check rather than a substitute for the converter. Highway speeds, bicycle speeds and walking speeds are good reference points: a brisk walk is about 5 km/h or 3 mph, a bicycle commuter about 20 km/h or 12 mph. If your result is far from the speed you expected for the situation, check which unit you typed.

Physics problems, sprint speeds and wind data use meters per second, while road and train speeds use kilometers per hour.

Remember that a speed is a ratio of distance to time. When you convert a pace such as minutes per kilometer, you cannot use a speed factor directly; convert to a speed first, then back.

Related pages: Speed Converter for the reverse direction, and the miles per hour to kilometers per hour pages. For other speed units use the speed converter.

The page keeps no history, so each visit starts again from the defaults, 10 meters per second. Your numbers are processed by JavaScript in your own browser and are never sent to a server, which makes the converter safe for private figures such as medical, financial or work measurements.