KM to Miles Converter - Free Online Tool

Convert kilometers to miles instantly. 1 km = 0.621371 miles. Fast, accurate conversion with adjustable precision. No signup, works offline.

Quick Reference

Kilometers	Miles
1 km	0.621 mi
5 km	3.107 mi
10 km	6.214 mi
21.1 km	13.11 mi (Half Marathon)
42.2 km	26.22 mi (Marathon)
100 km	62.14 mi

Fahrenheit to Celsius Converter - Free T…

Square Feet to Square Meters Converter -…

KG to LBS Converter - Weight for Fitness…

CM to Inches Converter - Metric to Imper…

Feet to Meters - Quick ft to m Conversio…

View all Unit calculators →

Frequently Asked Questions

1 kilometer equals 0.621371 miles. To convert km to miles, multiply by 0.621371.

Multiply kilometers by 0.621371 to get miles. For a quick estimate, divide by 1.6. Example: 100 km ÷ 1.6 ≈ 62.5 miles.

Yes. 1 kilometer is shorter than 1 mile. A kilometer is about 0.62 miles, or roughly 5/8 of a mile.

A 10-mile race equals approximately 16.09 kilometers. This is between a 10K (6.2 miles) and a half marathon (13.1 miles).

Most countries worldwide use kilometers (metric system). Only the US, UK, Liberia, and Myanmar primarily use miles for road distances.

The kilometer was established in 1799 as part of the metric system. It's defined as 1,000 meters, where the meter is based on Earth's circumference. The mile predates this, originating from Roman 'mille passus' (1,000 paces).

For driving distances and road signs, one decimal place is sufficient (e.g., 5.2 miles). For GPS coordinates or scientific measurements, use 3-6 decimal places. This converter provides full precision.

Yes. The converter uses the exact international standard (1 km = 0.621371192 mi). A marathon is precisely 42.195 km or 26.21875 miles.

Absolutely. All conversions happen directly in your browser using JavaScript. No data is transmitted to servers, ensuring complete privacy and offline functionality.

Remember that 5 km ≈ 3 miles (using Fibonacci numbers: 5→3, 8→5, 13→8). Or think '8 km race is about 5 miles.' For precision, use the 0.621 multiplier.

Related Tools