Miles to Kilometers
Convert miles to kilometers for international use. Enter any mile value — get kilometers for road signs, GPS settings, athletic records, and global communication.
Enter your values above to see the results.
Tips & Notes
- ✓Quick estimate: multiply miles by 1.6 (0.08% low). Even simpler: multiply by 8 and divide by 5 (miles × 8/5). Example: 30 miles → 30 × 8/5 = 48 km (exact: 48.28 km).
- ✓Speed conversion: mph × 1.60934 = km/h. US highway 65 mph = 104.6 km/h; city 25 mph = 40.2 km/h; school zone 15 mph = 24.1 km/h. Most international GPS units work in km/h by default.
- ✓International driving: if your car shows mph and you are driving in a km/h zone, multiply the posted speed limit by 0.621 to get mph equivalent. Or set your GPS to km/h mode. 80 km/h limit = 49.7 mph.
- ✓Marathon vs. race distances: the mile is used for track racing (the 4-minute mile), road racing in US/UK (mile, 5 miles, 10 miles, half marathon often marketed as 13.1 miles), and the legal mile of the London Marathon (26.2 miles = 42.195 km).
- ✓Nautical miles are different: 1 nautical mile = 1.852 km = 1.15078 statute miles. When sailing or flying internationally, nautical miles are standard. 100 nautical miles = 185.2 km = 115.1 statute miles.
Common Mistakes
- ✗Confusing statute miles with nautical miles — 1 statute mile = 1.60934 km; 1 nautical mile = 1.852 km (15% larger). Using the statute factor for nautical miles introduces significant error in navigation and aviation.
- ✗Not updating GPS units when driving internationally — a GPS set to miles will display the correct map but wrong speed limits and distance estimates. Always match your GPS unit settings to the local measurement standard.
- ✗Applying the linear factor to square miles — square miles to km² requires multiplying by 1.60934² = 2.58999. The US state of Texas = 268,596 sq miles × 2.58999 = 695,662 km² (not 432,634 km² which would be wrong).
- ✗Using miles per gallon without adjusting for different gallon sizes — US miles per gallon (US gallons) ≠ UK miles per gallon (imperial gallons). 1 UK gallon = 1.201 US gallons. A car rated 40 UK mpg = 33.3 US mpg. For international fuel economy comparison, convert to L/100km.
- ✗Assuming road distances in miles are the same as those in atlas km figures — always verify whether distances use miles or km. A UK road atlas shows distances in miles; most European atlases use km. The same physical route looks different in scale.
Miles to Kilometers Overview
Miles remain the primary distance unit for road travel in the US and UK, and appear in historical records, athletic distances (the mile race, the 26.2-mile marathon), and aviation (statute miles vs. nautical miles). Converting to kilometers is essential for international communication, GPS configuration, and metric market reporting.
Miles to kilometers formula:
km = miles × 1.60934 | 1 mile = 1,609.344 m exactly | Quick: km ≈ miles × 8/5
EX: US speed limit 65 mph → 65 × 1.60934 = 104.6 km/h. Boston Marathon 26.2 miles → 26.2 × 1.60934 = 42.165 km (standardized marathon is 42.195 km = 26.219 miles)mph to km/h speed conversion:
km/h = mph × 1.60934 | mph = km/h × 0.621371
EX: Interstate speed limit 70 mph → 70 × 1.60934 = 112.7 km/h. European motorway 120 km/h → 120 × 0.621371 = 74.6 mphMiles to km — common road distance conversions:
| Miles | Kilometers | Context |
|---|---|---|
| 1 mi | 1.609 km | Reference unit |
| 5 mi | 8.047 km | Short commute |
| 13.1 mi | 21.082 km | Half marathon (approx) |
| 26.2 mi | 42.165 km | Marathon (approx) |
| 50 mi | 80.47 km | Day trip radius |
| 100 mi | 160.93 km | Ultramarathon century |
| 500 mi | 804.67 km | Long-distance drive |
| 3,000 mi | 4,828 km | US coast-to-coast approx |
| Route | Miles | Kilometers |
|---|---|---|
| New York to Los Angeles | 2,790 mi | 4,490 km |
| London to Paris | 214 mi | 344 km |
| Equatorial circumference | 24,901 mi | 40,075 km |
| Moon distance (avg) | 238,855 mi | 384,400 km |
| Earth to Sun (1 AU) | 92,956,000 mi | 149,598,000 km |
Frequently Asked Questions
Multiply miles by 1.60934. Examples: 1 mile = 1.609 km; 5 miles = 8.047 km; 10 miles = 16.093 km; 26.2 miles (marathon) = 42.165 km; 100 miles = 160.934 km; 1,000 miles = 1,609.34 km. Quick approximation: multiply by 1.6 (0.08% error). Or multiply by 8 and divide by 5 for slightly better accuracy: 50 miles × 8/5 = 80 km (exact: 80.467 km).
km/h = mph × 1.60934. Key conversions: 15 mph = 24.1 km/h (school zone); 25 mph = 40.2 km/h (residential); 35 mph = 56.3 km/h (suburban); 55 mph = 88.5 km/h (rural); 65 mph = 104.6 km/h (US interstate); 70 mph = 112.7 km/h (UK motorway maximum). Memory aids: 60 mph = 96.56 km/h ≈ 100 km/h; 100 mph = 160.93 km/h. If driving in Europe, the km/h speed limits on road signs need no conversion if you know these reference points.
Major US route distances converted: New York to Boston 330 miles = 531 km; New York to Washington DC 225 miles = 362 km; Los Angeles to San Francisco 381 miles = 613 km; LA to Las Vegas 270 miles = 434 km; Miami to Orlando 236 miles = 380 km; Chicago to Detroit 281 miles = 452 km; Seattle to Portland 174 miles = 280 km. Cross-country: New York to Los Angeles 2,790 miles = 4,490 km; driving coast-to-coast takes typically 41-45 hours of drive time.
The mile (from Latin "mille passuum" — one thousand paces) was originally 1,000 Roman double-steps (each about 1.48 m = 4.86 ft), making the Roman mile approximately 1,480 m — shorter than the modern statute mile. The English statute mile was legally defined in 1593 as 5,280 feet (8 furlongs of 660 feet each). The kilometer was created during the French Revolution in 1795 as 1/10,000 of the distance from the equator to the North Pole. The modern mile was precisely defined as 1,609.344 meters in 1959 as part of the international yard-and-pound agreement, making the conversion exact.
Aviation uses nautical miles (nm), not statute miles. 1 nm = 1.852 km = 1.15078 statute miles. Airspeed is in knots (nautical miles per hour). A flight of 500 nm = 926 km = 575 statute miles. Maritime navigation also uses nautical miles — 1 knot = 1.852 km/h = 1.151 mph. The nautical mile is defined as 1 minute of arc along any meridian, making it directly useful for navigation: 60 nm = 1 degree of latitude. When airline websites show flight distances in miles, they are usually using statute miles for simplicity, not nautical miles.
km = miles × 1.60934. A car with 75,000 miles on the odometer = 75,000 × 1.60934 = 120,701 km. Common odometer conversions: 30,000 mi = 48,280 km (low mileage); 60,000 mi = 96,561 km (moderate); 100,000 mi = 160,934 km; 150,000 mi = 241,402 km; 200,000 mi = 321,869 km (high mileage). Note: Japanese domestic market (JDM) vehicles show odometers in km; European vehicles in km; US and UK vehicles in miles. When importing a vehicle, convert odometer to the local standard for accurate service records and resale.