Speed, Distance and Time Calculator

What this tool does

The three quantities are locked together by one relationship, so knowing any two gives you the third. Leave the field you want blank; the units are kilometres and hours, but any consistent pair works the same way.

Formula

v = d ÷ t , d = v × t , t = d ÷ v

Variables

Worked example

Limitations

• The formula assumes ideal conditions: no friction losses, no air resistance and no efficiency losses unless you enter them.
• Mixing units is the most common source of error. Convert every input to the units shown next to each field before calculating.