Convert between meters, feet, inches, miles, and more — instantly.
All conversions
| Unit | Value |
|---|---|
| Meter (m) | — |
| Kilometer (km) | — |
| Centimeter (cm) | — |
| Millimeter (mm) | — |
| Mile (mi) | — |
| Yard (yd) | — |
| Foot (ft) | — |
| Inch (in) | — |
| Nautical Mile (nmi) | — |
Common reference points
The ToolBrainy Length Converter lets you instantly convert any distance or measurement between the most common length units — meters, kilometers, centimeters, millimeters, miles, yards, feet, inches, and nautical miles. Type a value, pick your units, and see both the primary result and a full conversion table update in real time.
Whether you are converting measurements for construction, travel, science, or everyday use, everything runs directly in your browser with no data sent to a server and no account required.
Type any number into the input field. Decimals are fully supported.
Choose the unit you are converting from on the left, and the unit you want on the right. Use the swap button to quickly reverse them.
The result updates as you type, and the table below shows conversions to every supported unit at once.
Covers metric and imperial: meters, km, cm, mm, miles, yards, feet, inches, and nautical miles.
Live conversion as you type — no calculate button, no page reload.
Hit the swap button to instantly reverse the from and to units.
See your value converted to all 9 units simultaneously in one clean table.
One-click presets for common distances: marathon, mile, nautical mile, Mt. Everest.
Runs entirely in your browser. Nothing is sent to a server. Always free.
Convert between metric and imperial measurements when reading international blueprints or buying materials.
Convert distances on road signs, maps, or GPS between miles and kilometers when traveling abroad.
Convert measurement units in lab reports, technical specs, and datasheets quickly and accurately.
Convert race distances (5K, marathon, miles) and understand course measurements in any unit system.
Convert package dimensions between centimeters and inches when filling out international shipment forms.
Help students verify measurement conversions for math, physics, and geography assignments.
There are exactly 3.28084 feet in one meter. Conversely, 1 foot equals 0.3048 meters. This tool calculates the conversion automatically to full precision as you type.
One mile equals exactly 1.609344 kilometers. One kilometer equals approximately 0.621371 miles. This is the standard definition used internationally.
A nautical mile is 1,852 meters (approximately 1.15078 statute miles). It is used in maritime and aviation navigation and corresponds to one minute of arc along a meridian of the Earth.
There are exactly 12 inches in one foot, and 3 feet in one yard. These are the core relationships of the imperial length system used in the United States and the United Kingdom.
Yes. This tool uses exact defined conversion factors — for example, 1 inch is defined as exactly 25.4 millimeters. All conversions chain through meters as the SI base unit, ensuring maximum precision.
Yes. The tool handles any numeric value including very large numbers (like kilometers of ocean distance) and very small ones (like millimeters or fractions of an inch). Results are formatted to avoid unnecessary trailing zeros.