Length Converter
Instantly convert between meters, kilometers, miles, feet, inches, centimeters, millimeters, yards and more. Accurate and easy-to-use length conversion tool.
More Length Unit Converters
Explore more length conversions, including meters, feet, inches, centimeters, kilometers and miles, for fast, accurate results every time.
Length Converter: Meters, Feet, Inches, Miles & More
This free length converter changes a distance or size from one unit to another, instantly and accurately. Convert meters, kilometers, centimeters, millimeters, miles, yards, feet and inches, and also nautical miles, angstroms, micrometers, light years and parsecs. Choose your units, type a value or move the slider, and tap any popular conversion for a quick answer.
Quick answer: 1 meter is 3.28084 feet, 1 inch is 2.54 centimeters, and 1 mile is 1.609344 kilometers. So 100 meters is about 328.08 feet, and 5 miles is about 8.05 kilometers.
How to Convert Length
Length conversion multiplies by a fixed factor. To change inches to centimeters, multiply by 2.54, and to change feet to meters, multiply by 0.3048. The converter first changes your value to meters and then into the unit you chose, so every pair of units works, including miles to millimeters or yards to kilometers.
| From | To | Multiply by |
|---|---|---|
| Meters | Feet | 3.280840 |
| Feet | Meters | 0.3048 |
| Inches | Centimeters | 2.54 |
| Centimeters | Inches | 0.393701 |
| Miles | Kilometers | 1.609344 |
| Kilometers | Miles | 0.621371 |
| Yards | Meters | 0.9144 |
| Millimeters | Inches | 0.039370 |
Example: 6 ft × 0.3048 = 1.8288 m, and 10 km × 0.621371 = 6.214 mi.
Feet, Inches and Meters
Height, room sizes and building plans often switch between feet, inches and meters. These values use the exact definitions, so they match the converter above:
| Feet | Meters | Inches |
|---|---|---|
| 1 ft | 0.3048 m | 12 in |
| 3 ft | 0.9144 m | 36 in |
| 5 ft | 1.524 m | 60 in |
| 6 ft | 1.8288 m | 72 in |
| 10 ft | 3.048 m | 120 in |
| 100 ft | 30.48 m | 1,200 in |
| Inches | Centimeters | Millimeters |
|---|---|---|
| 1 in | 2.54 cm | 25.4 mm |
| 6 in | 15.24 cm | 152.4 mm |
| 12 in | 30.48 cm | 304.8 mm |
| 24 in | 60.96 cm | 609.6 mm |
| 36 in | 91.44 cm | 914.4 mm |
| 72 in | 182.88 cm | 1,828.8 mm |
Miles and Kilometers
Road signs, running distances and travel use miles in the United States and the UK and kilometers almost everywhere else. A mile is 1.609344 km, so a quick mental check is to multiply miles by 1.6. The standard marathon of 26.2 miles is about 42.16 km.
| Miles | Kilometers | Feet |
|---|---|---|
| 1 mi | 1.609 km | 5,280 ft |
| 3.1 mi | 4.989 km | 16,368 ft |
| 5 mi | 8.047 km | 26,400 ft |
| 10 mi | 16.093 km | 52,800 ft |
| 26.2 mi | 42.165 km | 138,336 ft |
| 100 mi | 160.934 km | 528,000 ft |
Scientific and Astronomical Units
Very small and very large lengths use special units. Micrometers and nanometers describe cells and chip features, and the angstrom is common in chemistry. In space, distances are given in astronomical units, light years and parsecs, which are far too large for meters to be practical.
| Unit | Length in meters |
|---|---|
| Nautical mile | 1,852 m |
| Astronomical unit (AU) | 149,597,870,700 m |
| Light year | 9.4607305 × 10¹⁵ m |
| Parsec | 3.0856776 × 10¹⁶ m |
| Angstrom | 1 × 10⁻¹⁰ m |
Who Uses a Length Converter?
Students use it for math and science, and builders, engineers and architects use it to read plans drawn in another system. Tailors and crafters use it for patterns and fabric, travelers use it for distances and luggage sizes, and online shoppers use it to compare product dimensions. For other measurements, see the weight converter for kilograms and pounds, the area converter, the volume converter, or the unit converter, which brings every category together.
How to Use This Length Converter
Choose your units
Pick the starting unit and the target unit, or use the Metric, Imperial, Scientific and Astronomical buttons for common pairs.
Enter the length
Type a number, move the slider, or tap a popular conversion to fill everything in.
Read the result
The answer appears instantly with the full unit names, such as 1 Meter = 100 Centimeters.
Swap if needed
Use the swap button to reverse the conversion in one tap.