Length Converter
Convert length between millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles. Our free Length Converter provides fast, accurate conversions for all your measurement needs, whether you're working on a DIY project, studying, or traveling.
What Is a Length Converter?
A length converter (or distance converter) is a tool that converts measurements between different units of length. This is useful when working with international measurements, DIY projects, travel, science, and many other applications.
This converter supports both metric units (millimeters, centimeters, meters, kilometers) and imperial/US customary units (inches, feet, yards, miles). Whether you're converting inches to centimeters, meters to feet, or kilometers to miles, this tool provides fast, accurate results.
How Does the Length Converter Work?
The calculator converts your input to a base unit (meters) and then converts from meters to your desired output unit:
Common Conversion Factors:
1 millimeter = 0.001 meters
1 centimeter = 0.01 meters
1 meter = 1 meter
1 kilometer = 1000 meters
1 inch = 0.0254 meters
1 foot = 0.3048 meters
1 yard = 0.9144 meters
1 mile = 1609.344 meters
Example: To convert 10 inches to centimeters:
10 in × 0.0254 = 0.254 m → 0.254 × 100 = 25.4 cm
Simply enter a value, select the unit you're converting from and the unit you're converting to, and click "Convert". The calculator will show the result instantly.
Why Use This Length Converter?
- 8 Units Supported: Millimeters, centimeters, meters, kilometers, inches, feet, yards, miles.
- Metric & Imperial: Convert between metric and imperial systems seamlessly.
- All Conversions Option: See your value in every supported unit at a glance.
- Visual Comparison: A chart shows how your value compares across different units.
- Free & Private: No registration, no data storage.
Common Length Conversions
- 1 inch to cm: 1 in = 2.54 cm
- 1 foot to meters: 1 ft = 0.3048 m
- 1 meter to feet: 1 m = 3.28084 ft
- 1 kilometer to miles: 1 km = 0.621371 mi
- 1 mile to kilometers: 1 mi = 1.60934 km
- 1 yard to meters: 1 yd = 0.9144 m
❓ Length Converter FAQ
How do I convert inches to centimeters?
Multiply the number of inches by 2.54. For example, 10 inches × 2.54 = 25.4 centimeters. This calculator does this for you automatically.
How do I convert meters to feet?
Multiply the number of meters by 3.28084. For example, 5 meters × 3.28084 = 16.4042 feet. Our converter handles this instantly.
How do I convert kilometers to miles?
Multiply the number of kilometers by 0.621371. For example, 10 km × 0.621371 = 6.21371 miles. Use this calculator for quick conversions.
What is the difference between a meter and a yard?
A meter is slightly longer than a yard. 1 meter = 1.09361 yards, or 1 yard = 0.9144 meters. This converter can convert between meters and yards instantly.
How many millimeters are in an inch?
There are 25.4 millimeters in one inch. This is the exact conversion factor used by the calculator.
What is the difference between the metric and imperial systems?
The metric system is based on powers of 10 and is used by most countries worldwide. The imperial system (or US customary) is used primarily in the United States and a few other countries. This converter supports both.
How do I convert feet to meters?
Multiply the number of feet by 0.3048. For example, 10 feet × 0.3048 = 3.048 meters. The calculator does this conversion for you.
What is the relationship between centimeters and meters?
There are 100 centimeters in 1 meter. This is a basic metric conversion: m = cm ÷ 100, or cm = m × 100.
How do I convert miles to kilometers?
Multiply the number of miles by 1.60934. For example, 5 miles × 1.60934 = 8.0467 kilometers. Use this calculator for accurate conversions.
What is the difference between a nautical mile and a statute mile?
A statute mile (land mile) is 5,280 feet or 1,609.344 meters. A nautical mile is 6,076.12 feet or 1,852 meters and is used in maritime and aviation contexts. This calculator uses statute miles.
How do I convert yards to meters?
Multiply the number of yards by 0.9144. For example, 10 yards × 0.9144 = 9.144 meters. This calculator handles yards to meters conversions.
What is the most commonly used unit of length?
In the metric system, the meter is the base unit. In the US, feet and inches are commonly used for everyday measurements. Internationally, meters and kilometers are widely used.
How do I convert centimeters to inches?
Divide the number of centimeters by 2.54. For example, 10 cm ÷ 2.54 = 3.937 inches. The calculator can convert in both directions.
What is the conversion factor for inches to millimeters?
1 inch = 25.4 millimeters. To convert inches to millimeters, multiply by 25.4. To convert millimeters to inches, divide by 25.4.
How many feet are in a mile?
There are 5,280 feet in one mile. This is a standard conversion factor in the imperial system.
Can I use this converter for scientific measurements?
Yes. This converter uses exact conversion factors and provides high precision (up to 6 decimal places), making it suitable for scientific, engineering, and educational purposes.
What is the difference between length and distance?
Length and distance are often used interchangeably. Length typically refers to the measurement of an object, while distance refers to the space between two points. Both are measured in the same units.
How do I convert square feet to square meters?
This converter is for linear length. For area conversions (square units), please use our Area Calculator.