km/

Speed Calculator

Speed, distance or time: enter two and get the third, in the units you use.

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How it's calculated

speed = distance ÷ time
distance = speed × time
time = distance ÷ speed

Speed is how much distance is covered per unit of time, with no direction attached. The answer is an average over the whole trip; a journey at 60 km/h average may include moments at 100 and moments stopped. Units convert exactly (1 mph = 0.44704 m/s).

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