Convert between km/h, mph, knots, m/s and ft/s.
Convert between km/h, mph, knots, m/s and ft/s.
Enter values above and click Calculate — results will appear here with the formula explained.
Speed units pair a distance with an hour (or second), so their factors inherit exact distance definitions: the mile contributes 1.609344 km to every mph conversion. The knot — one nautical mile per hour — survives from navigation because nautical miles map onto latitude minutes.
Scientists favor meters per second because it slots directly into physics equations: highway speed 100 km/h equals 27.78 m/s, a figure worth internalizing for braking-distance intuition.
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Speed Converter: Convert between km/h, mph, knots, m/s and ft/s. Formula: result = value × (from-factor ÷ to-factor). Example: 120 km/h equals 74.
Speed units pair a distance with an hour (or second), so their factors inherit exact distance definitions: the mile contributes 1.609344 km to every mph conversion. The knot — one nautical mile per hour — survives from navigation because nautical miles map onto latitude minutes.
Scientists favor meters per second because it slots directly into physics equations: highway speed 100 km/h equals 27.78 m/s, a figure worth internalizing for braking-distance intuition.
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120 km/h equals 74.56 mph — worth knowing before setting cruise control on an American interstate signed in mph.
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