Speed Conversion

KM/H to M/S Calculator

Q: How do you convert km/h to m/s?

Divide the speed in kilometres per hour by 3.6. For example, 72 km/h divided by 3.6 equals 20 m/s.

Q: What is 100 km/h in metres per second?

100 km/h is approximately 27.78 m/s.

Q: What is 90 km/h in m/s?

90 km/h equals exactly 25 m/s because 90 divided by 3.6 equals 25.

Q: How do I convert m/s back to km/h?

Multiply the metres-per-second value by 3.6. For example, 25 m/s multiplied by 3.6 equals 90 km/h.

Q: Can I convert decimal km/h values?

Yes. Decimal km/h values can be converted using the same formula: divide by 3.6.

Q: Where is metres per second commonly used?

Metres per second is commonly used in physics, engineering, meteorology, sports science and other scientific applications.

Convert kilometres per hour to metres per second instantly. Enter any speed below and get the exact m/s result, plus useful equivalents in miles per hour and feet per second.

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Decimal values supported

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Example conversion

kilometres/hour

metres/second

Formula: metres per second = km/h ÷ 3.6

0 50 100 150+

Speed Converter

Convert KM/H to M/S

m/s = km/h ÷ 3.6

Enter a speed

Kilometres per hour

km/h

Enter a valid speed of 0 km/h or greater.

Results update automatically as you type. Decimal values are supported.

Conversion result

Speed equivalents

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Your result will appear here Enter a speed in km/h to see metres per second, miles per hour and feet per second.

Metres per second

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Primary conversion

MPH

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Miles/hour

FPS

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Feet/second

Quick conversions

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Conversion method

How to Convert KM/H to M/S

To convert kilometres per hour to metres per second, divide the speed by 3.6. This works because one kilometre contains 1,000 metres and one hour contains 3,600 seconds.

When both parts of the unit are converted, 1 km/h becomes 1,000 metres ÷ 3,600 seconds, which simplifies to 1 ÷ 3.6 metres per second.

Formula

m/s = km/h ÷ 3.6

Example

90 km/h ÷ 3.6
= 25 m/s

Quick reference

Common KM/H to M/S Conversions

These common speeds are useful for road speeds, wind measurements, physics problems and engineering calculations.

Kilometres per Hour	Metres per Second	Miles per Hour
10 km/h	2.78 m/s	6.21 mph
30 km/h	8.33 m/s	18.64 mph
50 km/h	13.89 m/s	31.07 mph
60 km/h	16.67 m/s	37.28 mph
80 km/h	22.22 m/s	49.71 mph
90 km/h	25 m/s	55.92 mph
100 km/h	27.78 m/s	62.14 mph
120 km/h	33.33 m/s	74.56 mph
200 km/h	55.56 m/s	124.27 mph

Practical uses

When Is KM/H to M/S Conversion Useful?

KM/H is common in everyday transport and weather reporting, while m/s is widely used in scientific and technical work. Converting between them is useful whenever a familiar speed needs to be used in an SI-based calculation.

Physics

Velocity is commonly expressed in metres per second when calculating acceleration, momentum and kinetic energy.

Engineering

Vehicle movement, fluid flow, mechanical systems and performance calculations often use SI units.

Wind Speed

Weather data may be displayed in km/h, while technical wind measurements and models often use m/s.

Sports Science

Sprinting speed, ball velocity and movement data are frequently analysed in metres per second.

Understanding the units

KM/H vs M/S

Both units measure speed, but they are normally used in different situations.

km/h

Kilometres per hour

Commonly used for road speeds, vehicle speedometers and everyday speed measurements in countries using the metric system.

m/s

Metres per second

Commonly used in physics, engineering and scientific work because it is based on SI units of metres and seconds.

Remember: 1 m/s = 3.6 km/h. This means the numerical value in metres per second will always be smaller than the equivalent value in km/h.

Common Questions

KM/H to M/S FAQs

Quick answers to the most common questions about converting kilometres per hour into metres per second.

How do you convert km/h to m/s?

Divide the speed in kilometres per hour by 3.6. For example, 72 km/h ÷ 3.6 = 20 m/s.

What is 100 km/h in metres per second?

100 km/h is approximately 27.78 m/s.

What is 90 km/h in m/s?

90 km/h equals exactly 25 m/s, because 90 ÷ 3.6 = 25.

Why do you divide by 3.6?

A kilometre contains 1,000 metres and an hour contains 3,600 seconds. Converting both parts of km/h therefore gives 1,000 ÷ 3,600 = 1 ÷ 3.6.

Is m/s the SI unit for speed?

Yes. Metres per second is the standard SI-derived unit used for speed and velocity in physics, engineering and scientific calculations.

How do I convert m/s back to km/h?

Multiply the metres-per-second value by 3.6. For example, 25 m/s × 3.6 = 90 km/h.

Can I convert decimal km/h values?

Yes. The calculator accepts decimal speeds such as 42.5 km/h and converts them using the same ÷ 3.6 formula.

Where is metres per second commonly used?

M/s is commonly used in physics, engineering, meteorology, sports science and other situations where SI units are preferred.

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Reverse conversion

M/S to KM/H Calculator

Convert metres per second back into kilometres per hour.

KM/H to MPH Calculator

Convert kilometres per hour to miles per hour.

MPH to KM/H Calculator

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