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General

Speed Calculator

Calculate average speed from a distance and a travel time.

Your numbers

Result

Average speed 53.3333
In the other unit 85.8317
Distance per minute 0.888889
Time in decimal hours 2.25
Covering 120 miles in 2.25 hours is an average of 53.3333 mph (85.8317 km/h).

This is average speed across the whole journey, including any time spent stopped. Actual travelling speed will be higher if the time includes stops.

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Questions

About this calculator

How do I work out drive time between jobs?

Use your realistic average speed rather than the speed limit. In urban service work, average door-to-door speed is often half the posted limit once traffic, parking and stops are counted.

Why is my average lower than I expected?

Because average speed includes every minute of the elapsed time. A ten-minute stop on a thirty-minute drive pulls the average down sharply.

The formula

speed = distance ÷ time

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