Length Converter — Metric and Imperial Units Guide
Length measurement is one of the most fundamental aspects of science, engineering, construction, and everyday life. Two major systems are in use globally: the metric system (used by most of the world) and the imperial system (used primarily in the USA, UK, and a few other countries). Our length converter handles all units from both systems instantly.
The Metric System
The metric system is based on powers of 10, making conversions straightforward. The base unit of length is the meter (m).
- 1 kilometer (km) = 1,000 meters
- 1 meter (m) = 100 centimeters
- 1 centimeter (cm) = 10 millimeters
- 1 millimeter (mm) = 1,000 micrometers
- 1 micrometer (µm) = 1,000 nanometers
The Imperial System
- 1 mile = 1,760 yards = 5,280 feet = 1.609 kilometers
- 1 yard = 3 feet = 36 inches = 0.9144 meters
- 1 foot = 12 inches = 30.48 centimeters
- 1 inch = 2.54 centimeters
Common Length Conversions
- 1 km = 0.6214 miles
- 1 mile = 1.6093 km
- 1 meter = 3.2808 feet
- 1 foot = 0.3048 meters
- 1 inch = 2.54 cm
- 1 cm = 0.3937 inches
Practical Uses
- Travel: Converting road distances between km and miles
- Construction: Converting measurements between metric and imperial for international projects
- Fitness: Converting race distances (5K = 3.1 miles; marathon = 42.195 km = 26.2 miles)
- Astronomy: Using nanometers for light wavelengths, light-years for cosmic distances