Kilometers to Miles Converter
Convert kilometers (km) to miles instantly. Free online distance converter with conversion table and formula.
Why Convert Distance from Kilometers to Miles?
While most of the world uses kilometers (km), the United States and United Kingdom still use miles for road distances. Converting kilometers to miles is essential when traveling to these countries, understanding American or British distances, or communicating with people who use the imperial system.
This conversion is commonly needed for understanding US road signs, race distances in American events, real estate measurements, and vehicle odometer readings.
What is a Kilometer?
The kilometer (km) is a unit of length in the International System of Units (SI). It is the standard unit for measuring road distances in most countries worldwide.
- One kilometer equals 1,000 meters
- One kilometer equals 0.621371 miles
- One kilometer equals 3,280.84 feet
- The prefix "kilo" means one thousand
What is a Mile?
The mile (mi) is a unit of length in the imperial and US customary systems. It is used primarily in the United States for road distances and speed limits.
- One mile equals 1.609344 kilometers
- One mile equals 5,280 feet
- One mile equals 1,760 yards
- The word "mile" comes from the Latin "mille passus" (thousand paces)
Kilometers to Miles Conversion Formula
To convert kilometers to miles, use the following formula:
Or equivalently:
Conversion Table: Kilometers to Miles
Here is a quick reference table for common distance conversions:
| Kilometers (km) | Miles (mi) | Common Reference |
|---|---|---|
| 1 km | 0.62 mi | Short walk |
| 5 km | 3.11 mi | 5K race distance |
| 10 km | 6.21 mi | 10K race distance |
| 21.1 km | 13.11 mi | Half marathon |
| 42.2 km | 26.22 mi | Full marathon |
| 50 km | 31.07 mi | Medium road trip |
| 100 km | 62.14 mi | Long drive |
| 200 km | 124.27 mi | Inter-city distance |
| 500 km | 310.69 mi | Cross-country segment |
| 1000 km | 621.37 mi | Long-distance travel |
| 5000 km | 3,106.86 mi | Transcontinental flight |
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Convert kilometers to miles instantly. To do it by hand, multiply the kilometers by 0.621371 — so 100 km = 62.14 miles. Kilometers are the metric unit of distance; miles are an imperial/US unit.
How do I convert km to miles?
- Enter the distance in kilometers.
- The result in miles appears automatically.
- Useful for travel and reading metric maps.
What is the km to miles formula?
miles = kilometers × 0.621371
Quick estimate: take about 60% of the kilometers value (100 km → ~62 miles).
Quick reference
| Kilometers | Miles |
|---|---|
| 1 km | 0.62 mi |
| 5 km | 3.11 mi |
| 10 km | 6.21 mi |
| 100 km | 62.14 mi |
Frequently asked questions
What is 10 km in miles?
10 km is about 6.21 miles.
How many miles is a 5K run?
A 5K (5 km) is about 3.11 miles.
Related tools & guides
- Miles to Kilometers Converter (reverse)
- Length Converter (all units)
- Length & distance conversion guide