How to use this converter
Each unit has a fixed factor relative to the family’s base unit. Use Swap units to reverse the direction.
- Enter what would you like to convert?, value, from unit and review the remaining options.
- Select Calculate or change a value to update the result. Read the result label and units before copying.
- Use Reset to restore the worked starting values.
Formula and method
US and UK volume units are explicitly distinguished. Display rounding does not change the underlying calculation. Display precision is adjustable from 0–15 decimal places; underlying factors are unchanged.
Worked example
100 km/h ≈ 62.1371 mph.
Questions about speed converter
How do I convert 60 mph to km/h?
Multiply by 1.609344. A speed of 60 mph is 96.56064 km/h. Speed is distance per time; running pace reverses that relationship and is expressed as time per distance.
What assumptions should I check?
US and UK volume units are explicitly distinguished. Display rounding does not change the underlying calculation. Display precision is adjustable from 0–15 decimal places; underlying factors are unchanged.
Are my inputs saved?
Calculations run in your browser. We store only tool IDs for favorites and recent tools. A calculation link contains your inputs only when you explicitly choose to copy one.