Physics calculator

Speed Distance Time Calculator

Calculate average speed and pace from distance and travel time using metric or imperial units.

FormulaSpeed = distance / time

Formula

Average speed

Speed = distance / time

100 km in 2.5 hours gives an average speed of 40 km/h; 100 miles in 2.5 hours gives 40 mph.

FAQ6 common questions for this calculator.

FAQs

Is this average speed or instant speed?+

It calculates average speed over the whole distance and time entered.

Can I enter speed-distance-time distance in miles?+

Yes. Switch the unit system to Imperial before entering distance in miles.

How does the Speed Distance Time Calculator calculate the result?+

For the Speed Distance Time Calculator, it uses the Average speed: Speed = distance / time. 100 km in 2.5 hours gives an average speed of 40 km/h; 100 miles in 2.5 hours gives 40 mph.

What information do I need to use the Speed Distance Time Calculator?+

For the Speed Distance Time Calculator, enter distance and travel time. Keep the units consistent with the calculator fields and compare your setup with the worked example on the page.

How accurate is the Speed Distance Time Calculator?+

Speed Distance Time Calculator is accurate for the quantities and units entered into Average speed. Real systems may differ when friction, losses, directions, uncertainty, or non-ideal conditions are relevant.

What should I check before using the Speed Distance Time Calculator result?+

For the Speed Distance Time Calculator, check distance and travel time, unit system, signs or directions, and whether the real situation matches the Average speed and worked example. Idealized formulas may not include friction, losses, or uncertainty.

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Physics guide

How to use the Speed Distance Time Calculator

Calculate average speed and pace from distance and travel time using metric or imperial units. The page also explains the average speed and shows a practical example: 100 km in 2.5 hours gives an average speed of 40 km/h; 100 miles in 2.5 hours gives 40 mph.

  1. 1

    Enter your details

    Enter distance and travel time using metric or imperial units, then complete any other fields shown in the calculator.

  2. 2

    Check the calculation

    Review the result alongside the average speed: Speed = distance / time.

  3. 3

    Compare scenarios

    Change one or more inputs to see how they affect the speed Distance Time Calculator result before you use the estimate.