Browse categories

Unit Converters

Speed Converter

Convert speed units instantly and locally.

Converted result1.609344 km/h

1 mph equals 1.609344 km/h

Common conversions

Mach uses the documented reference assumption of 343 m/s; actual sound speed varies with conditions.

Miles per hour: Symbol mph; converted through Metres per second.

Kilometres per hour: Symbol km/h; formatting is applied only after calculation.

Conversion runs locally in your browser.

Popular speed converter pages

Miles per hour to Kilometres per hour ConverterKilometres per hour to Miles per hour ConverterMetres per second to Kilometres per hour ConverterKilometres per hour to Metres per second ConverterMetres per second to Miles per hour ConverterMiles per hour to Metres per second ConverterKnot to Miles per hour ConverterMiles per hour to Knot ConverterKnot to Kilometres per hour ConverterKilometres per hour to Knot Converter

Common conversion table

Miles per hour (mph)Kilometres per hour (km/h)
1 mph1.609344 km/h
2 mph3.218688 km/h
5 mph8.04672 km/h
10 mph16.09344 km/h
20 mph32.18688 km/h
25 mph40.2336 km/h
50 mph80.4672 km/h
100 mph160.9344 km/h

Available units

  • Metres per second (m/s)
  • Kilometres per hour (km/h)
  • Miles per hour (mph)
  • Feet per second (ft/s)
  • Knot (kn)
  • Mach (standard approximation) (Mach) — Uses 343 m/s, approximately the speed of sound in dry air at 20°C.

How to use this converter

  1. Choose two speed units and enter a value.
  2. Review the live result and use Copy result when you need to share it.

How the conversion works

Speeds convert through metres per second; Mach uses the stated 343 m/s reference.

Formula

Speeds convert through metres per second; Mach uses the stated 343 m/s reference.

Step-by-step calculation

  1. Choose two speed units and enter a value.
  2. Speeds convert through metres per second; Mach uses the stated 343 m/s reference.
  3. Check the displayed result, then copy it if needed.

Worked example

60 mph equals 96.56064 km/h.

Risk guidance

Frequently asked questions

Does this tool send my inputs anywhere?

No. The interactive calculation runs in your browser and this site does not submit tool inputs to a backend.

How should I use the result?

Check that the entered units and values match your situation, especially around dates, breaks, and rounding.

Related tools