Work through the task
Express one speed in another supported unit while keeping its meaning explicit.
- Choose kilometres per hour to miles per hour, or the precise pair required for your task.
- Enter a decimal quantity and run the conversion. Both distance and time are part of a speed unit. The supported mile is the statute mile.
- Review the result before copying or downloading. Editing an input invalidates the previous result; keep an original if the transformation matters.
Example to check
1 km/h is about 0.621371 mph
Limits and output behavior
Use finite values within the bounds shown by the controls. This calculator uses floating-point arithmetic and rounded display values; an exported decimal is not a promise of exact accounting precision. Both distance and time are part of a speed unit. The supported mile is the statute mile.
Troubleshooting
Check both selected units and use a finite decimal value within the stated bounds. Correct a missing/invalid field before rerunning; a displayed rounded value does not add precision to the input.
Questions
Does converting speed also convert a trip into a distance?
No. Both distance and time are part of the selected speed unit. The tool does not infer a journey duration or distance.
Input and privacy
Processing runs in this browser. Inputs are not saved automatically. An explicitly chosen local draft, where offered, is plaintext storage on this device. Downloaded files, clipboard contents and browser extensions have separate retention behavior.