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Speed Calculator

Calculate speed, distance or time when you know the other two.

How it works Report a problem


Speed Calculator

Calculate Speed, Distance, or Time.

About the Speed Calculator

Calculate speed, distance or time when you know the other two.

How to use the Speed Calculator

  1. Choose What do you want to calculate?: Speed, Distance or Time.
  2. Fill in the two known values and their units.
  3. Press Calculate.

Formula and method

v = d ÷ t, d = v × t and t = d ÷ v.

Worked example

120 miles in 2 hours is 60 mph.

Tips

  • Use consistent units. To convert km/h to m/s, divide by 3.6.

Frequently asked questions

How do I convert mph to km/h?
Multiply by 1.609.