Miles to Km Calculator
Free UK Miles to Kilometres Calculator 2025. Convert miles to km and km to miles instantly. Includes speed conversion (mph to km/h) and common UK distances.
Last updated: February 2026
Miles to Kilometres Converter
Convert distances between miles and kilometres, plus speed conversions for UK travellers
Enter a value to convert
1 mile = 1.60934 kilometres | 1 km = 0.62137 miles
Quick Distance Conversions
Conversion Formulas
Kilometres = Miles × 1.60934
Example: 10 miles × 1.60934 = 16.0934 km
Miles = Kilometres × 0.621371
Example: 100 km × 0.621371 = 62.14 miles
Miles → Km: Use Fibonacci numbers (1,1,2,3,5,8,13,21...)
Each Fibonacci number in miles ≈ the next number in km!
5 miles ≈ 8 km | 8 miles ≈ 13 km | 13 miles ≈ 21 km
UK Speed Limit Conversions
Essential for UK drivers travelling to Europe where speed limits are in km/h:
Miles to Kilometres Conversion Table
| Miles | Kilometres | Metres | Context |
|---|---|---|---|
| 0.5 | 0.80 | 805 | Short walk |
| 1 | 1.61 | 1,609 | ~20 minute walk |
| 3.1 | 5 | 5,000 | 5K run |
| 6.2 | 10 | 10,000 | 10K run |
| 13.1 | 21.1 | 21,097 | Half Marathon |
| 26.2 | 42.2 | 42,195 | Marathon |
| 50 | 80.5 | 80,467 | Ultra distance |
| 62.1 | 100 | 100,000 | 100 km ultra |
| 100 | 160.9 | 160,934 | Century ride |
Popular UK to Europe Driving Distances
London → Paris
London → Brussels
London → Amsterdam
London → Berlin
London → Barcelona
London → Rome
Why Does the UK Use Miles?
The UK is one of only a few countries that still uses miles for road distances. Here's why:
Countries That Use Miles
| Country | Road Signs | Speed Limits |
|---|---|---|
| United Kingdom | Miles | MPH |
| United States | Miles | MPH |
| Liberia | Miles (mostly) | MPH |
| Myanmar | Miles (transitioning) | MPH |
| All other countries | Kilometres | KM/H |
Running & Marathon Distances
| Event | Kilometres | Miles | Notes |
|---|---|---|---|
| Parkrun | 5 km | 3.11 miles | Weekly UK community runs |
| 10K Race | 10 km | 6.21 miles | Popular distance |
| Great North Run | 21.0975 km | 13.1 miles | Half marathon |
| London Marathon | 42.195 km | 26.2 miles | Full marathon |
| Ultra Marathon (50 mi) | 80.47 km | 50 miles | Common ultra distance |
| 100 Mile Ultra | 160.93 km | 100 miles | Extreme endurance |
Practical Tips for UK Drivers in Europe
Converting between miles and kilometres is essential when driving abroad, but there are several other practical considerations UK motorists should keep in mind when crossing the Channel.
Adjusting Your Speedometer
Most modern UK vehicles display both mph and km/h on the speedometer dial or digital display. If your car only shows mph, you can purchase a temporary km/h sticker overlay for your speedometer, or use a sat-nav that displays speed in km/h. Many smartphone navigation apps such as Waze and Google Maps allow you to switch the speed display unit in their settings, providing a convenient real-time reference.
Key European Speed Limits to Remember
Speed limits vary considerably across Europe. In France, motorways are generally 130 km/h (81 mph) in dry weather and 110 km/h (68 mph) in rain. Spain and Italy share a 120 km/h (75 mph) motorway limit, while Germany's Autobahn has advisory sections with no enforced maximum.
Urban areas across most EU countries default to 50 km/h (31 mph), and many residential zones enforce 30 km/h (19 mph) limits. Fines for speeding in Europe can be significantly higher than in the UK, and some countries issue on-the-spot fines that must be paid immediately.
Fuel Economy Conversion
Fuel consumption in the UK is measured in miles per gallon (mpg), but continental Europe uses litres per 100 kilometres (L/100km). To convert, divide 282.5 by your mpg figure. For instance, a car achieving 40 mpg uses approximately 7.1 L/100km. This conversion is helpful when comparing fuel costs at European petrol stations, where prices are displayed per litre and consumption figures on rental cars are typically given in L/100km.
How to Convert Miles to KM
This converter provides instant, accurate results for your measurement conversions. The UK uses a mix of metric and imperial measurements in daily life, which can make conversions a frequent necessity. Road signs use miles, food is sold in grams and kilograms, and height is often quoted in feet and inches despite the metric system being the official standard.
Understanding the conversion formula helps verify results and perform quick mental calculations when a tool is not available.
Key Information
Common UK conversion factors: 1 inch = 2.54 cm, 1 foot = 30.48 cm, 1 mile = 1.609 km, 1 pound (lb) = 0.4536 kg, 1 stone = 6.35 kg, 1 pint (UK) = 568 ml, 1 gallon (UK) = 4.546 litres, 1 acre = 0.4047 hectares. Temperature conversions use the formula: Celsius = (Fahrenheit - 32) x 5/9.
Example Calculation
To convert 5 feet 10 inches to centimetres: first convert to total inches (5 x 12 + 10 = 70 inches), then multiply by 2.54 to get 177.8 cm. For weight, a person weighing 12 stone 7 lbs is 12.5 stone, which equals 79.4 kg (12.5 x 6.35).
Source: Based on international measurement standards. Last updated March 2026.
Frequently Asked Questions
There are exactly 1.609344 kilometres in one mile. For most practical purposes, 1.61 km is accurate enough. For quick mental maths, multiply miles by 1.6 to get an approximate kilometre value (e.g., 10 miles × 1.6 = 16 km).
There are approximately 0.621371 miles in one kilometre. For quick mental maths, multiply kilometres by 0.6 or divide by 1.6 to get an approximate mile value (e.g., 100 km × 0.6 = 60 miles, or 100 km ÷ 1.6 = 62.5 miles).
The UK uses miles for road distances due to historical tradition. While the UK officially adopted the metric system in 1965, road signs and speed limits were exempted. The estimated cost of converting all road signs to kilometres (over £700 million) combined with public familiarity with miles has prevented the change. Most EU countries use km for roads.
To convert miles per hour (mph) to kilometres per hour (km/h), multiply by 1.60934. For example: 70 mph × 1.60934 = 112.65 km/h. The UK motorway limit of 70 mph equals approximately 113 km/h, which is similar to European motorway limits of 110-130 km/h.
A marathon is exactly 42.195 kilometres or 26.2188 miles (commonly rounded to 26.2 miles). This distance was established at the 1908 London Olympics. A half marathon is 21.0975 km or 13.1094 miles (rounded to 13.1 miles).
The Fibonacci sequence (1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89...) provides a clever approximation because the ratio between consecutive numbers approaches 1.618, close to the miles-to-km conversion factor of 1.609. So: 5 miles ≈ 8 km, 8 miles ≈ 13 km, 13 miles ≈ 21 km, and so on. It's remarkably accurate for quick mental maths!
Only four countries officially use miles for road distances: the United Kingdom, United States, Liberia, and Myanmar. All other countries in the world use kilometres. This means UK drivers need to be particularly careful when driving in Europe or elsewhere, as road signs and speed limits will be in km and km/h.
Related Calculators
Last Updated: February 2026 | This calculator uses the exact conversion factor: 1 mile = 1.609344 kilometres. Conversions are accurate for all practical purposes. Speed limit information is based on current UK and European regulations.
Expert Reviewed — This calculator is reviewed by our team of financial experts and updated regularly with the latest UK tax rates and regulations. Last verified: February 2026.
Pro Tips for Accurate Results
- Double-check your input values before calculating
- Use the correct unit format (metric or imperial)
- For complex calculations, break them into smaller steps
- Bookmark this page for quick future access
Understanding Your Results
Our Miles To Km Calculator provides:
- Instant calculations - Results appear immediately
- Accurate formulas - Based on official UK standards
- Clear explanations - Understand how results are derived
- 2025/26 updated - Using current rates and regulations
Common Questions
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