Speed Converter

Convert between speed units

Formula

All through m/s. 1 m/s = 3.6 km/h = 2.237 mph = 1.944 knots. Mach 1 ≈ 343 m/s at sea level.

Meter per second is the SI unit. Knot is nautical mile/hour. Mach is ratio to speed of sound (varies with conditions).

How to Calculate Manually

1
Enter the speed value
2
Select source unit
3
Select target unit
4
Calculator converts through m/s
5
Shows converted speed

Reference Table

Unit	m/s	km/h	mph	knots
1 m/s	1	3.6	2.237	1.944
1 km/h	0.278	1	0.621	0.540
1 mph	0.447	1.609	1	0.869
1 knot	0.514	1.852	1.151	1

Speed Converter: mph, km/h, knots, m/s, and Mach

Speed conversion is crucial for travel, aviation, maritime navigation, and physics. Different fields use different units: mph for US roads, km/h internationally, knots for aviation/shipping, m/s for science, and Mach for supersonic speeds...

Frequently Asked Questions

How do I convert mph to km/h? 1 mph = 1.60934 km/h exactly. Multiply mph by 1.60934 to get km/h.: 1 mph = 1.60934 km/h exactly. Multiply mph by 1.60934 to get km/h.
What is a knot? 1 knot = 1 nautical mile per hour = 1.852 km/h = 1.15078 mph. Used in aviation and maritime contexts.: 1 knot = 1 nautical mile per hour = 1.852 km/h = 1.15078 mph. Used in aviation and maritime contexts.
What is Mach 1? Mach 1 = speed of sound ≈ 343 m/s = 1,235 km/h = 767 mph at sea level, 20°C. Varies with temperature and altitude.: Mach 1 = speed of sound ≈ 343 m/s = 1,235 km/h = 767 mph at sea level, 20°C. Varies with temperature and altitude.

Calculator

Formula

Formula

How to Calculate Manually

Reference Table

Speed Converter: mph, km/h, knots, m/s, and Mach

Frequently Asked Questions

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