This online calculator converts speed from kilometers per hour (km/h) to miles per hour (mph). Kilometers per hour is commonly used in metric system countries, while miles per hour is standard in the United States and a few other regions.

Kilometers per Hour (km/h) to Miles per Hour (mph) Converter

Enter a value in kilometers per hour and press the button

Kilometers per Hour (km/h)

Result in Miles per Hour (mph)

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Calculation process will appear here.
Decimal Places

How to Use the Tool

  1. Enter Speed in km/h: Type the speed value in kilometers per hour.
  2. Click Convert: Press the conversion button to get the equivalent speed in miles per hour.
  3. View Result: The converted value appears instantly.
  4. Adjust Decimal Places: Modify the decimal precision if necessary.
  5. Copy Result: Click the copy button to save the result for use elsewhere.
  6. Clear Fields: Reset all input fields with the clear button.

Measurement Units Explained

Kilometers per Hour (km/h)

Kilometers per hour (km/h) is a metric unit of speed measuring how many kilometers are traveled in one hour. It is commonly used worldwide for speed limits, vehicle speedometers, and transportation. The official abbreviation is “km/h”.

1 km/h = 0.621371 mph

Miles per Hour (mph)

Miles per hour (mph) is a speed measurement unit used mainly in the United States, the United Kingdom, and a few other countries. It measures the distance in miles covered in one hour. The official abbreviation is “mph”.

1 mph = 1.60934 km/h

Km/h to Mph Converter Online

How many miles per hour is in one km/h

Conversion Formula

To convert kilometers per hour (km/h) to miles per hour (mph), use the following formula:

mph = km/h × 0.621371

Source: NIST

Conversion Table

Kilometers per Hour (km/h)Miles per Hour (mph)
53.11
106.21
3018.64
5031.07
8049.71
10062.14
12074.56
16099.42
200124.27
300186.41

Real World Examples

  • Speed limit in a residential area (USA): 40 km/h = 24.85 mph
  • Typical highway speed limit (Germany): 130 km/h = 80.78 mph
  • Cruising speed of a Boeing 747: 920 km/h = 571.66 mph
  • Top speed of a Formula 1 car: 360 km/h = 223.69 mph
  • Speed of a high-speed train (Japan’s Shinkansen): 320 km/h = 198.84 mph
  • Speed limit on a rural road (UK): 96 km/h = 59.65 mph
  • Maximum speed of a Tesla Model S Plaid: 322 km/h = 200.08 mph
  • Top Speed of the fastest production motorcycle (Dodge Tomahawk): 420 km/h = 260.98 mph
  • Landing speed of a commercial airplane: 260 km/h = 161.56 mph
  • Top speed of a bullet train (France’s TGV): 574.8 km/h = 357.2 mph

What is your scenario for using this tool? Would you like additional features? Let us know in the comments!

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