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Speed, distance and time calculator

Work out journey time, distance or average speed from the other two.

Speed in miles an hour, distance in miles.

The journey takes 2 hours 30 minutes.

Show the workings

Step	Sum	Answer
Time	150 miles ÷ 60 mph × 60	150 minutes

What this leaves out or assumes

Assumes the same speed the whole way. Real journeys include stops and slower stretches.

Where the figures come from

This sum uses only the numbers you entered.

The three sums

Time = distance ÷ speed. 150 miles at 60 mph takes 2.5 hours, or 2 hours 30 minutes.
Distance = speed × time. 70 mph for 30 minutes is 35 miles.
Speed = distance ÷ time. 120 miles in 2 hours is 60 mph.

An average speed includes slow stretches and stops, so it is usually well below the speed limit on the road you drive.

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