KM to Miles Converter
KM to Miles Converter
Convert kilometers to miles instantly. Free, accurate, and 100% private.
🛣️ KM ↔ Miles
📊 Quick Reference
What Is a Kilometer?
A kilometer (km) is a unit of length in the metric system, equal to 1,000 meters. It is the standard unit of distance in most countries around the world, including Europe, Asia, Africa, and South America.
What Is a Mile?
A mile (mi) is a unit of length in the imperial system, equal to 5,280 feet or 1,760 yards. It is primarily used in the United States and United Kingdom for road distances.
The Formula
To convert kilometers to miles:
To convert miles back to kilometers:
Step-by-Step Example
Convert 100 km to miles:
- Formula: miles = 100 × 0.621371
- Multiply: 100 × 0.621371 = 62.1371
- Result: 100 km = 62.14 miles
Why Use Our Converter?
Our tool is fast, accurate, and 100% free. It runs entirely in your browser — no signup, no uploads, no tracking. It shows the formula used so you can learn the math, and supports 6 different units.
Key Features
- ⚡ Instant conversion as you type
- 🔄 Bidirectional — KM ↔ Miles and more
- 📐 Shows the exact formula used
- 📊 6 units supported (km, mi, m, ft, yd, nmi)
- ⚡ Quick presets for common distances
- 🔐 100% private — nothing leaves your browser
Perfect For
❓ FAQ
How many miles is 1 km?
1 km = 0.621371 miles. In other words, 1 mile = 1.609344 km.
Is this converter free?
Yes, 100% free with no signup and no limits.
How many miles is a 5K?
5K = 3.11 miles. 10K = 6.21 miles. Marathon = 26.2 miles.
What is the exact conversion factor?
1 km = 0.6213711922 miles exactly.
Which countries use miles?
USA uses miles. UK uses miles for roads but km for other things. Most other countries use km.
Does it work on mobile?
Yes, fully responsive on all devices.
Can I convert miles to km?
Yes! Change the FROM dropdown to “Miles” and TO to “Kilometers”. Or click the Swap button.
Is my data stored?
No. Everything runs in your browser. Nothing leaves your device.
