Length Converter
Convert between metric and imperial length units instantly. Supports millimeters, centimeters, meters, kilometers, inches, feet, yards, miles, and nautical miles.
Quick Answer
1 meter = 3.281 feet = 39.37 inches. 1 mile = 1.609 km. 1 inch = 2.54 cm. Select your units below and enter a value to convert between 9 length units in real time.
Convert Length
Enter a value and select units to convert.
All Equivalents
| Unit | Value |
|---|---|
| Millimeters (mm) | 1,000 |
| Centimeters (cm) | 100 |
| Meters (m) | 1 |
| Kilometers (km) | 0.001 |
| Inches (in) | 39.370079 |
| Feet (ft) | 3.28084 |
| Yards (yd) | 1.093613 |
| Miles (mi) | 0.00062137 |
| Nautical Miles (nmi) | 0.00053996 |
About This Tool
The Length Converter provides instant, accurate conversions between 9 commonly used length and distance units spanning both the metric and imperial systems. Whether you are converting building measurements from feet to meters, checking product dimensions in centimeters versus inches, or translating road distances from miles to kilometers, this tool handles it all with real-time updates as you type.
Metric vs Imperial
The metric system (millimeters, centimeters, meters, kilometers) is based on powers of 10, making conversions within the system straightforward. The imperial system (inches, feet, yards, miles) uses varying conversion factors: 12 inches per foot, 3 feet per yard, and 5,280 feet per mile. Most of the world uses metric, while the United States, Liberia, and Myanmar still primarily use imperial units for everyday measurements.
Common Conversions
The most frequently searched length conversions include feet to meters (multiply by 0.3048), inches to centimeters (multiply by 2.54), and miles to kilometers (multiply by 1.609344). For quick mental math: 1 meter is about 3 feet 3 inches, 1 kilometer is roughly 0.62 miles, and 1 inch is about 2.5 centimeters. These approximations are useful when traveling or shopping internationally.
Nautical Miles
A nautical mile (1,852 meters) is used in maritime and air navigation. Unlike land miles, it is defined by the Earth's geometry: one nautical mile equals one minute of latitude. This makes it invaluable for navigation because distances on nautical charts correspond directly to angular measurements on the globe. Speed measured in nautical miles per hour is called a knot.
Frequently Asked Questions
How many feet are in a meter?
How do I convert miles to kilometers?
What is the difference between a nautical mile and a regular mile?
How many inches are in a centimeter?
Why do some countries use metric and others use imperial?
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