Speed & Velocity Unit Converter
Convert between km/h, m/s, mph, knots, and Mach speed.
Speed Units Reference Matrix
About Calculator
The Speed Converter handles km/h, m/s, mph, knots, and Mach number. All conversions use standard physical definitions: 1 m/s = 3.6 km/h, 1 mile = 1609.344 m, 1 knot = 1 nautical mile/h = 1.852 km/h, and Mach 1 ≈ 343 m/s at sea level.
This tool is useful for aviation, maritime, automotive, and physics applications where different speed units are commonly used across different contexts.
Frequently Asked Questions (FAQ)
What is a knot?
A knot equals 1 nautical mile per hour (1.852 km/h or about 1.151 mph). It's the standard speed unit in aviation and maritime navigation.
What speed is Mach 1?
Mach 1 is the speed of sound, approximately 343 m/s (1,235 km/h) at sea level and 15°C. It varies with altitude and temperature.
How do I convert mph to km/h?
Multiply mph by 1.60934. For example, 60 mph ≈ 96.56 km/h.
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