Speed Distance Time Calculator

Choose what you want to find and enter the other two values.

Find

Distance

Distance unit

Speed

Speed unit

Hours

Minutes

Seconds

–

The three formulas

Speed = distance ÷ time
Distance = speed × time
Time = distance ÷ speed

A common memory aid is the triangle with D on top and S and T at the bottom: cover the one you want and the other two show the formula.

Examples

Lahore to Islamabad on the M-2 is about 375 km. At an average of 100 km/h, that is 3 hours 45 minutes of driving, before stops. A runner covering 10 km in 50 minutes averages 12 km/h, a pace of 5:00 per km.

Units

1 m/s = 3.6 km/h, 1 mile = 1.609 km, and 1 knot = 1.852 km/h (used at sea and in aviation). Average speed over a trip includes slow sections and stops, so it is lower than your cruising speed. Plan travel times with a margin, and always keep to the speed limit.

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How it works

Enter — type or paste your values or text.
Get the result — it is worked out in your browser.
Adjust — change the inputs to compare, or copy the result.

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