Convert miles to kilometres • mph to km/h • running pace
Convert your running pace between minutes per mile and minutes per kilometre.
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The United Kingdom is a fascinating anomaly when it comes to measurement systems. While most of the world officially adopted the metric system decades ago, Britain operates a dual system — using both imperial and metric measurements depending on the context.
Road signs in the UK display distances in miles and speed limits in miles per hour (mph). This is deeply entrenched in British infrastructure and culture. The cost of replacing every road sign in the country (estimated at over £500 million) has been cited as a major barrier to full metrication. Additionally, there's considerable public attachment to the imperial system for certain measurements — people think in miles, pints, and stone.
Did you know? The UK began metrication in 1965 and adopted the metric system for most trade and commerce by the 1980s. However, a 1973 European directive allowed the UK to keep imperial units for road signs — and they have remained ever since.
The imperial system (miles, feet, inches, pounds) evolved from ancient Roman, Anglo-Saxon, and Norman measurements that were standardised over centuries. The mile itself derives from the Roman mille passus (thousand paces), which measured about 1,480 metres.
The metric system was developed during the French Revolution (1790s) as a rational, decimal-based alternative. The metre was defined as one ten-millionth of the distance from the Equator to the North Pole. Today, the metric system (International System of Units, SI) is used by every country in the world for scientific measurement and by all but three countries for daily life.
The three countries that have not officially adopted the metric system as their primary system of measurement are the United States, Liberia, and Myanmar. However, the UK's unique dual-system status means many Britons still use imperial for distance, speed, and personal weight.
The mile is primarily used for road distances and speed limits in just a handful of countries and territories:
Additionally, Canada uses kilometres officially but some older roadsigns in rural areas still feature miles, and many Canadians still colloquially use miles in conversation.
For runners transitioning between mile- and kilometre-marked races (common when comparing UK/US events versus European ones), here are practical tips:
To convert a min/mile pace to min/km, divide by 1.609. For example, a 7:00 min/mile pace equals approximately 4:21 min/km. To go the other way, multiply by 1.609 — a 5:00 min/km pace equals about 8:03 min/mile.
Distance Converter: Enter any value, select the unit you have, and the result appears instantly in the other unit. Click the “Swap” button to reverse the direction.
Speed Converter: Enter a speed in mph or km/h and see the equivalent in the other unit. Useful for understanding UK speed limits (motorways: 70 mph = 113 km/h).
Pace Converter: Enter your running pace in minutes and seconds per mile (or km) and see the converted pace. Essential for preparing overseas races or comparing training paces across different units.