KM/H to M/S converter

How to convert kilometers per hour to meters per second

To convert kilometers per hour to meters per second, use m/s = km/h ÷ 3.6. For example, 100 km/h is 27.7778 m/s. Type any value in the converter above and the result updates instantly.

The KM/H to M/S formula

The conversion is m/s = km/h ÷ 3.6. One kilometer per hour equals 0.277778 m/s. This conversion is exact: kilometer per hour is defined precisely in terms of meter per second, so the only rounding is in the digits shown.

KM/H to M/S conversion table

Where kilometers per hour and meters per second are used

Kilometers per hour is the speed unit on road signs and vehicle instruments in most of the world.

Meters per second is the SI unit of speed, used in physics, sport science and weather reports.

Worked examples

These examples use the formula above, so you can check the converter or do the same by hand:

• 20 km/h = 5.55556 m/s
• 50 km/h = 13.8889 m/s
• 80 km/h = 22.2222 m/s

Converting kilometers per hour to meters per second in your head

As a quick estimate, multiply by 0.28 (rounded).

M/S to KM/H reference table

For the opposite direction, these values are handy to have at hand:

Common mistakes to avoid

• Speed limits, aviation and sailing use different units: knots are used at sea and in the air, not on roads.
• Rounded rules of thumb are fine for driving estimates but not for precise engineering calculations.

About this converter

The converter accepts whole numbers, decimals and negative values, gives the result as you type, and uses full precision internally, so what you copy is as accurate as it can be. It runs in your browser: nothing you type is sent to a server, it keeps working offline once the page has loaded, and there is nothing to install.

Need the opposite direction? Use the M/S to KM/H converter.