XUNGLEE / Unit converter
mph to km/h
Convert mph to km/h instantly, with editable values, unit swapping and a shared conversion engine.
No thousands separators. Use a decimal point or your language's decimal separator. Scientific notation is accepted, for example 1.5e3.
How it works
Speed over time, with international miles and nautical miles for knots. One knot is 1.852 km/h.
Conversion formula
Result = value × source factor ÷ target factor. Factors below express one unit in the base unit.
Results show up to 15 significant digits. Calculations use browser floating-point numbers; rounding and numerical limits apply.
Your measurements are not sent to a server or saved. No account is needed.
Popular conversions
Unit reference
Base unit: m/s
| Unit | Value in base unit |
|---|---|
| m/s | 1 |
| km/h | 0.27777777777778 |
| mph | 0.44704 |
| knot | 0.51444444444444 |
Questions & answers
Why are US and UK gallons different?
They are different definitions. Select the explicitly labelled US or UK unit for volume and fuel consumption.
Are GB and GiB the same?
No. GB uses powers of 1000; GiB uses powers of 1024. This converter keeps their unit choices separate.