M/S to KM/H Calculator — Convert Metres per Second

Convert metres per second to kilometres per hour instantly, or switch direction for the reverse conversion. Results also include mph and knots.

✅ Free ⇄ Converts Both Ways ⚡ Instant Results 🔒 No Sign-Up

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M/S ⇄ KM/H Calculator

Convert speed instantly in either direction

Metres per second (m/s)

m/s

Kilometres per hour

Miles per hour

Knots

Quick values

Exact factor: multiply m/s by 3.6, or divide km/h by 3.6. Reverse results may be rounded for readability.

How to Convert M/S to KM/H

To convert metres per second to kilometres per hour, multiply the speed by 3.6. There are 3,600 seconds in an hour and 1,000 metres in a kilometre. Because 3,600 ÷ 1,000 = 3.6, one metre per second is exactly 3.6 kilometres per hour.

Primary conversionkm/h = m/s × 3.6

Reverse conversionm/s = km/h ÷ 3.6

Exact relationship: 1 m/s = exactly 3.6 km/h. Use the direction switch in the calculator to convert either way.

Worked M/S to KM/H Examples

1 m/s × 3.6 = 3.6 km/h

5 m/s × 3.6 = 18 km/h

10 m/s × 3.6 = 36 km/h

20 m/s × 3.6 = 72 km/h

25 m/s × 3.6 = 90 km/h

50 m/s × 3.6 = 180 km/h

100 m/s × 3.6 = 360 km/h

M/S to KM/H Conversion Table

Use this reference table for common speeds. MPH values are rounded to two decimal places.

Metres per second	Kilometres per hour	Miles per hour
1 m/s	3.6 km/h	2.24 mph
2 m/s	7.2 km/h	4.47 mph
5 m/s	18 km/h	11.18 mph
10 m/s	36 km/h	22.37 mph
15 m/s	54 km/h	33.55 mph
20 m/s	72 km/h	44.74 mph
25 m/s	90 km/h	55.92 mph
50 m/s	180 km/h	111.85 mph
100 m/s	360 km/h	223.69 mph

M/S vs KM/H

Metres per second (m/s) is the SI unit of speed and is commonly used in physics, engineering, science and technical measurements. Kilometres per hour (km/h) is commonly used for road speeds, vehicles and everyday speed measurements in countries using the metric system.

For conversions involving several speed units at once, use the broader Speed Converter.

Practical Uses

Physics and scienceTranslate laboratory and textbook measurements into everyday speeds.

EngineeringCompare technical specifications with vehicle or transport speeds.

Wind and weatherConvert scientific wind readings into familiar km/h values.

SportUnderstand athlete, ball and equipment speeds.

Vehicles and transportConvert technical motion data into road-speed units.

Precision and Rounding

The ×3.6 conversion factor is exact. When converting km/h back to m/s, the mathematical result may contain repeating decimals, so the calculator rounds long results for readability while retaining sensible precision.