Kilometers per hour to Miles per hour Converter

How many miles per hour in 1 km/h?

1 km/h = 0.6213711922 mph. The other way round: 1 mph = 1.609344 km/h. Kilometres per hour is the road speed unit in nearly every country; 1 km/h is exactly 1/3.6 m/s. Miles per hour is the speed unit on road signs in the US and the UK; 1 mph is exactly 1.609344 km/h.

Kilometers per hour to miles per hour conversion table

1 km/h = 0.6214 mph · 2 km/h = 1.2427 mph · 3 km/h = 1.8641 mph · 4 km/h = 2.4855 mph · 5 km/h = 3.1069 mph · 6 km/h = 3.7282 mph · 7 km/h = 4.3496 mph · 8 km/h = 4.971 mph · 9 km/h = 5.5923 mph · 10 km/h = 6.2137 mph · 12 km/h = 7.4565 mph · 15 km/h = 9.3206 mph · 20 km/h = 12.4274 mph · 25 km/h = 15.5343 mph · 30 km/h = 18.6411 mph · 40 km/h = 24.8548 mph · 50 km/h = 31.0686 mph · 75 km/h = 46.6028 mph · 100 km/h = 62.1371 mph · 1,000 km/h = 621.3712 mph

How to convert kilometers per hour to miles per hour

Divide the value by 1.609344. Example: 37 km/h = 22.9907 mph.

Unit Converter

• cm → in
• in → cm
• ft → m
• m → ft
• ft → cm
• cm → ft
• kg → lb
• lb → kg
• °C → °F
• °F → °C
• km → mi
• mi → km
• L → gal
• gal → L
• ml → fl oz
• fl oz → ml
• g → oz
• oz → g
• m² → ft²
• ft² → m²
• mph → km/h
• km/h → mph
• MB → GB
• GB → MB
• GB → TB
• TB → GB
• st → kg
• kg → st
• mm → in
• in → mm
• yd → m
• m → yd
• ac → ha
• ha → ac
• kcal → kJ
• kJ → kcal
• bar → psi
• psi → bar

How to use

1. 1Pick a category — length, weight, temperature, volume, area, speed, data, time, pressure or energy.
2. 2Choose the “from” and “to” units, or press swap to reverse them.
3. 3Type a value in either field — the other side updates as you type.
4. 4Adjust the decimal precision and check the conversion table for common values.

Exact conversion factors

Many imperial units are defined exactly in metric terms: 1 inch = 2.54 cm, 1 foot = 0.3048 m, 1 mile = 1.609344 km, 1 pound = 0.45359237 kg and 1 US gallon = 3.785411784 litres. The converter uses these definitions, so results are as precise as the decimals you choose to show. The formula is displayed in words — for example “multiply by 2.54” — so you can repeat the calculation by hand.

Temperature is different

Celsius, Fahrenheit and Kelvin do not share a zero point, so temperature cannot be converted with a single factor. °F = °C × 9/5 + 32 and °C = (°F − 32) × 5/9; Kelvin is Celsius + 273.15. That is why 0 °C is 32 °F, while a 10-degree change in Celsius is an 18-degree change in Fahrenheit.

US vs UK units and data sizes

A US gallon (3.785 L) is smaller than an imperial UK gallon (4.546 L), and US fluid ounces differ slightly from UK ones — check which system your recipe or spec uses. For data sizes, storage makers use decimal units (1 GB = 1,000 MB), while operating systems often count in binary units (1 GiB = 1,024 MiB), which is why a new drive shows less capacity than the label.

Frequently asked questions

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