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Length Converter
Convert between metric, imperial, and other length units instantly.
Quick Reference
1 km = 0.621371 miles
1 mile = 1.60934 km
1 foot = 0.3048 m
1 inch = 2.54 cm
1 yard = 0.9144 m
1 nautical mile = 1.852 km
Frequently Asked Questions
How many feet are in a mile?▼
There are exactly 5,280 feet in one mile. This comes from the Roman mille passuum (1,000 paces), where each pace was 5 Roman feet.
What is the difference between a nautical mile and a regular mile?▼
A nautical mile (1,852 m) is based on the Earth's circumference — it equals one minute of latitude. A statute mile is 1,609.34 m. Nautical miles are used in navigation and aviation.
How many centimeters in an inch?▼
One inch equals exactly 2.54 centimeters. This was defined in 1959 by international agreement to standardize the relationship between imperial and metric units.
What is a light-year?▼
A light-year is the distance light travels in one year — approximately 9.461 × 10¹⁵ meters (9.461 trillion km or 5.879 trillion miles). It is used to measure astronomical distances.
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