Length Converter
Convert between meters, kilometers, feet, inches, and more.
What is a Length Converter?
A Length Converter is an essential measurement tool that translates distances and lengths between different unit systems—primarily metric (meters, centimeters, kilometers) and imperial (feet, inches, miles). Whether you're a student solving physics problems, an engineer working on international projects, a traveler trying to understand road distances, or anyone dealing with measurements from different countries, this converter provides instant, accurate conversions with precision up to 6 decimal places.
The world uses two primary measurement systems: the metric system (used by most countries, based on powers of 10), and the imperial/US customary system (used primarily in the United States, based on historical British measurements). The metric system is considered more intuitive because units scale by factors of 10, 100, or 1000—making mental math easier. For example, 1 kilometer = 1000 meters, and 1 meter = 100 centimeters. The imperial system uses less consistent ratios: 1 mile = 1760 yards = 5280 feet, and 1 foot = 12 inches.
Our converter uses a 'base unit' approach for maximum accuracy. All conversions first transform the input value to meters (the metric base unit), then convert from meters to the target unit. This two-step process ensures consistency and minimizes rounding errors. For example, converting 5 feet to inches goes: 5 ft → 1.524 meters → 60 inches. Each unit has a precise conversion ratio stored in the system: 1 foot = 0.3048 meters (exact), 1 inch = 0.0254 meters (exact), 1 mile = 1609.344 meters (exact).
Specialized unit support includes nautical miles (1852 meters), which are used in maritime and aviation navigation because they're based on the Earth's latitude grid (one nautical mile equals one minute of latitude). We also support micrometers (millionths of a meter, used in engineering and microscopy) and nanometers (billionths of a meter, used in physics and nanotechnology). The 'Quick Reference' section at the bottom shows common conversions from your selected unit, making it easy to get a mental scale reference for everyday comparisons.
1How to Use
- Enter the numerical value you want to convert in the 'From' input field. You can type or paste any number, including decimals.
- Select your source unit from the dropdown menu (e.g., Meters, Feet, Kilometers, Miles, etc.). There are 11 units to choose from.
- Select your target unit from the 'To' dropdown. This is the unit you want to convert to.
- The result appears instantly and automatically updates as you type—no need to click a 'Convert' button.
- Click the copy icon next to the result to copy the converted value to your clipboard for use in other applications.
- Use the swap button (circular arrows) in the middle to instantly reverse the conversion direction if needed.
- Scroll down to see a quick reference panel showing how 1 unit of your selected source converts to other common units.
★Key Features
- 11 Comprehensive Units: Convert between meters, kilometers, centimeters, millimeters, micrometers, nanometers, miles, yards, feet, inches, and nautical miles.
- Real-Time Precision: Results update instantly as you type, with mathematical precision up to 6 decimal places for scientific accuracy.
- Base Unit Architecture: Uses meters as a universal base to ensure accurate, consistent conversions across all unit pairs.
- Bidirectional Swap: Quickly reverse the conversion direction with one click using the intuitive swap button.
- Quick Reference Panel: See at-a-glance conversions showing how 1 of your selected unit compares to other common units.
- Copy to Clipboard: One-click copying of results for easy pasting into documents, spreadsheets, or calculations.
- Mobile Responsive: Works flawlessly on all devices—desktop, tablet, and smartphone with optimized touch interfaces.
- No Limits: Unlimited conversions with no sign-up, registration, or hidden fees. Completely free and private.