Miles to Kilometres Explained
The international mile is defined as exactly 1,609.344 metres (or 1.609344 kilometres). This exact definition, agreed in 1959, means the conversion between miles and kilometres is perfectly precise, not an approximation.
When travelling from a country that uses miles (USA, Myanmar) to one that uses kilometres, this converter helps you quickly understand distances. For example, a 26-mile marathon is 41.84 km, and a 60 mph speed limit equals 96.56 km/h.
Common reference points: 1 mile = 1.609 km; 5 miles ≈ 8.05 km; 10 miles ≈ 16.09 km; 100 miles ≈ 160.9 km.
Formula
To convert miles to kilometres, multiply by the exact conversion factor: km = miles × 1.609344. To reverse the conversion (kilometres to miles), divide by 1.609344, which is equivalent to multiplying by approximately 0.621371.
Common Miles to Kilometres Conversions
- 1 mile = 1.609 km
- 5 miles = 8.047 km
- 10 miles = 16.093 km
- 26.2 miles (marathon) = 42.195 km
- 60 mph = 96.561 km/h
- 100 miles = 160.934 km
Which Countries Use Miles?
The mile is still the primary unit of road distance in the United States and a small number of other territories. Almost all other countries, including all European nations, use kilometres as the standard unit under the International System of Units (SI). Travellers moving between these systems — particularly for driving, running, or cycling — regularly need to convert between the two.
Miles in Running and Cycling
Many running events and training plans in the US are measured in miles, while European races and international athletics use kilometres. Common running benchmarks: 1 mile = 1.609 km; 5K = 3.107 miles; 10K = 6.214 miles; a half marathon is 13.1 miles (21.097 km); a full marathon is 26.2 miles (42.195 km).
Related Calculators
- Kilometres to Miles — Convert distance in km to miles. Useful for European routes and odometers.
- KPH to MPH Converter — Convert kilometres per hour to miles per hour for UK driving.
- MPH to KPH Converter — Convert miles per hour to kilometres per hour for European driving.