Skip to content

m/s to km/h Converter

Convert meters per second to kilometers per hour and back. 1 meter per second = 3.6 kilometers per hour exactly.

Speed converter
Type an amount. Use the tabs to switch direction.
m/s
Result: Km/h
36kilometers per hour
1 m/s = 3.6 km/h
Also equals
22.369363 mph
Miles Per Hour
19.438445 kn
Knots
Learn how we calculate this below

Tip: Results show up to 8 significant digits. The factors and their sources are listed on the "Where our numbers come from" page.

Updated

On this page
  1. m/s and km/h
  2. Quick conversion table
  3. Exact factor and source
  4. How to convert meters per second to kilometers per hour
  5. All speed units compared
  6. What is a meter per second?
  7. What is a kilometer per hour?
  8. What this converter does not do
  9. Frequently asked questions
  10. References
  11. Related converters

m/s and km/h

One meter per second is exactly 3.6 kilometers per hour, and one kilometer per hour is about 0.277777777778 meters per second. The converter works both ways: use the two tabs at the top of the tool to choose the direction.

Quick conversion table

m/s to km/h

m/skm/h
1 m/s3.6 km/h
2 m/s7.2 km/h
3 m/s10.8 km/h
5 m/s18 km/h
10 m/s36 km/h
15 m/s54 km/h
20 m/s72 km/h
25 m/s90 km/h
30 m/s108 km/h
50 m/s180 km/h
100 m/s360 km/h

km/h to m/s

km/hm/s
1 km/h0.27777778 m/s
5 km/h1.3888889 m/s
10 km/h2.7777778 m/s
18 km/h5 m/s
36 km/h10 m/s
50 km/h13.888889 m/s
72 km/h20 m/s
90 km/h25 m/s
100 km/h27.777778 m/s
120 km/h33.333333 m/s
200 km/h55.555556 m/s

Exact factor and source

ConversionValueBasis
1 meter per second in kilometers per hour3.6exact. SI Brochure, 9th edition (BIPM 2019): SI derived unit of speed
1 kilometer per hour in meters per second0.277777777778rounded to 12 digits. 1 km/h = 1000 m / 3600 s = 1/3.6 m/s exactly (SI Brochure: hour = 3600 s)

How to convert meters per second to kilometers per hour

  1. Step oneTake the number of meters per second.
  2. Step twoMultiply it by 3.6.
  3. Step threeThe result is the number of kilometers per hour.
  4. Step fourTo go back, divide by 3.6, or multiply by 0.277777777778.
km/h = m/s x 3.6

Example: 10 m/s x 3.6 = 36 km/h.

All speed units compared

Each unit written in meters per second, the base unit of this tool. Exact values come straight from the definitions.

UnitSymbolValue in meters per second
Meters per secondm/s1 meter per second
Kilometers per hourkm/h0.277777777778 meters per second
Miles per hourmph0.44704 meters per second
Knotskn0.514444444444 meters per second

What is a meter per second?

Meters per second (m/s) is the SI unit of speed. One m/s is exactly 3.6 km/h and about 2.23693629205 mph. Science and weather forecasts often use it.

What is a kilometer per hour?

Kilometers per hour (km/h) is the road speed unit in most of the world. One km/h is 0.621371192237 miles per hour, or about 0.277777777778 meters per second.

What this converter does not do

  • Results are rounded for display to 8 significant digits; the stored factor is the exact one.
  • It converts a speed; it does not convert a speed into a pace such as minutes per mile.
  • It does not know the speed limits of any road.

Frequently asked questions

How many kilometers per hour are in a meter per second?

1 meter per second is exactly 3.6 kilometers per hour. That factor is exact by definition.

How many meters per second are in a kilometer per hour?

1 kilometer per hour is about 0.277777777778 meters per second.

How fast is it to cover 100 meters in 10 seconds?

100 meters in 10 seconds is 10 m/s, which is 36 km/h.

Where do the factors come from?

Meters per second: SI Brochure, 9th edition (BIPM 2019): SI derived unit of speed. Kilometers per hour: 1 km/h = 1000 m / 3600 s = 1/3.6 m/s exactly (SI Brochure: hour = 3600 s).

References