Convert Miles (mi) to Kilometers (km)
1 mile equals 1.60934 kilometers.
Mile to Kilometer Converter
What Is a Mile?
The mile (mi) is a unit of length in the US customary and British imperial systems. The statute mile is defined as exactly 5,280 feet or 1.609344 kilometers. It is the standard unit for road distances in the US, UK, and a few other countries.
What Is a Kilometer?
The kilometer (km) is a metric unit of length equal to 1,000 meters. It is the global standard for measuring road distances, used by most countries, international athletics, and navigation systems.
Miles to Kilometers Formula
The conversion factor is exact:
kilometers = miles × 1.609344 exact
This comes from the definition: 1 mile = 5,280 ft × 0.3048 m/ft = 1,609.344 m exactly.
Worked Example
Convert a marathon (26.2 miles) to kilometers:
- Multiply: 26.2 × 1.609344 = 42.16 km
The official marathon distance is 42.195 km.
Quick Estimation
For mental math, multiply miles by 1.6 (within 0.6%). Example: 100 miles × 1.6 = 160 km (exact: 160.93 km). An even quicker trick: add 60% to the miles value.
Common Use Cases
- Road travel: US/UK speed limits in mph; most other countries in km/h. 60 mph = 96.6 km/h.
- Running and cycling: Marathon = 26.2 mi = 42.2 km. 5K = 3.1 mi. 10K = 6.2 mi.
- Navigation: GPS devices may switch units at borders. Knowing 1 mi ≈ 1.6 km helps interpret distances.
- Fuel efficiency: MPG (US) to km/L requires this conversion. 30 MPG ≈ 12.75 km/L.
Frequently Asked Questions
How many kilometers are in a mile?
1 mile = exactly 1.609344 km. For quick mental math, 1 mile ≈ 1.6 km.
How do I quickly convert miles to km in my head?
Multiply by 1.6. Or add 60%: 50 miles + 30 = 80 km (exact: 80.47 km). The Fibonacci trick also works: consecutive Fibonacci numbers approximate the mi→km ratio (5 mi ≈ 8 km).
Is a mile longer than a kilometer?
Yes — 1 mile = 1.609 km, so a mile is about 61% longer than a kilometer.
What is the difference between a statute mile and a nautical mile?
A statute mile = 1.609 km (land use). A nautical mile = 1.852 km (maritime/aviation). A nautical mile is about 15% longer, based on one arcminute of latitude.
Common Mile to Kilometer Conversions
| Mile | Kilometer | Actions |
|---|---|---|
| 10 miles | 16.0934 kilometers | |
| 26.2 miles | 42.1648 kilometers | |
| 50 miles | 80.4672 kilometers | |
| 100 miles | 160.934 kilometers |
Miles to kilometers Conversion Table
Reference table with common miles to kilometers conversions. All values calculated with high precision.
Miles to Kilometers Table
0.0001 to 12
Miles to Kilometers Table
1 to 100000
Kilometers to Miles Table
0.001 to 5
Kilometers to Miles Table
10 to 1000000
Looking for the reverse? Convert Kilometer to Mile
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