Speed Distance Time

Calculate speed, distance or time — enter any two values to find the third.

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Calculate

Distance

Unit

Time (hours)

Speed

Result

In Different Units

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Speed Distance Time Formula

Speed = Distance ÷ Time. Distance = Speed × Time. Time = Distance ÷ Speed. Keep units consistent.

How do I convert km/h to mph?+

Divide km/h by 1.609 to get mph. E.g. 100 km/h ÷ 1.609 = 62.1 mph.

How long does it take to drive 100 miles at 60 mph?+

Time = 100 ÷ 60 = 1.67 hours = 1 hour 40 minutes.

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