Free online length converter. Select any unit pair below or use the interactive converter.
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Length is the measurement of distance from one point to another. It is one of the seven fundamental SI units and forms the basis of all spatial measurements. The challenge is that different countries and industries use different systems — the metric system (meters, kilometers) is used by most of the world, while the imperial system (inches, feet, miles) is primarily used in the United States and partially in the UK. Converting between these systems is essential in construction, engineering, travel, science, and everyday life.
Quick reference for the most commonly used length conversions:
| From | To | Multiply By |
|---|---|---|
| Meters (m) | Feet (ft) | 3.28084 |
| Meters (m) | Inches (in) | 39.3701 |
| Meters (m) | Yards (yd) | 1.09361 |
| Centimeters (cm) | Inches (in) | 0.393701 |
| Kilometers (km) | Miles (mi) | 0.621371 |
| Miles (mi) | Kilometers (km) | 1.60934 |
| Inches (in) | Centimeters (cm) | 2.54 |
| Feet (ft) | Meters (m) | 0.3048 |
| Yards (yd) | Meters (m) | 0.9144 |
| Nautical miles | Kilometers (km) | 1.852 |
| Metric Unit | Symbol | Imperial Equivalent |
|---|---|---|
| Millimeter | mm | 0.03937 inches |
| Centimeter | cm | 0.3937 inches |
| Meter | m | 3.28084 feet |
| Kilometer | km | 0.621371 miles |
| — | — | — |
| 2.54 cm | — | 1 inch (in) |
| 30.48 cm | — | 1 foot (ft) |
| 91.44 cm | — | 1 yard (yd) |
| 1,609.34 m | — | 1 mile (mi) |
| 1,852 m | — | 1 nautical mile (nmi) |
1 meter = 100 centimeters. The prefix "centi" means one hundredth, so 1 cm = 0.01 m.
1 foot = 12 inches. This is the standard imperial unit relationship — used in the US for measuring height.
1 mile = 1.60934 kilometers. Conversely, 1 km = 0.62137 miles. Essential for converting road distances between US/UK and metric countries.
1 inch = 2.54 centimeters exactly. This is the internationally agreed definition — a key conversion for screen sizes, clothing, and engineering.
1 meter = 3.28084 feet. Conversely, 1 foot = 0.3048 meters exactly. Used when converting height or room dimensions between metric and imperial.
A nautical mile = 1,852 meters = 1.852 km = 1.15078 miles. It is used in aviation and maritime navigation and equals 1 minute of arc of latitude on the Earth's surface.
1 meter = 1.09361 yards — a meter is slightly longer than a yard. 1 yard = 0.9144 meters exactly. Yards are used in US football and cricket.