Speed Converter

km/h, mph, m/s, knots and ft/s at a glance. Convert speed units instantly: kilometres per hour, miles per hour, metres per second, knots and feet per second. Free speed converter for driving, running and aviation.

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Tentang Speed Converter

Car speedometers read km/h or mph depending on the country, physics uses m/s, aviation uses knots, and ballistics uses ft/s. This converter covers all five from one input: type a value, pick its unit, and every other unit appears instantly — 100 km/h is 62.14 mph, 27.78 m/s and about 54 knots. Handy for driving abroad, reading research papers and decoding weather reports.

Cara memakai Speed Converter

Enter your speed value.
Choose the unit it is in.
Read all other speed units instantly.
Swap units to reverse the conversion.

Fitur utama

km/h, mph, m/s, knots and ft/s
Instant full table from one input
Exact conversion factors
Swap button for quick reversal

How fast is 100 km/h in mph?

62.14 mph. Multiply km/h by 0.621371 — or just read it here.

Why do planes use knots?

Knots are nautical miles per hour, and nautical miles map directly onto latitude minutes — making navigation calculations natural.

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