Length Converter — Free Online Length Unit Converter
Our free length converter instantly converts between all major length and distance units. Use the length converter to switch between meters, feet, inches, kilometers, miles, centimeters, yards and more — no sign-up required. This length converter is powered by verified conversion factors based on international SI standards. Learn more at Wikipedia's unit of length reference and the NIST unit conversion guide.
📏 Length & Distance Converter
Popular Length Conversions
Jump straight to the conversion you need.
Quick Reference Tables
Common length values converted at a glance.
Centimeters → Inches
| Centimeter (cm) | Inch (in) |
|---|---|
| 0.5 cm | 0.19685039 in |
| 1 cm | 0.39370079 in |
| 2 cm | 0.78740157 in |
| 3 cm | 1.181102 in |
| 5 cm | 1.968504 in |
| 10 cm | 3.937008 in |
| 15 cm | 5.905512 in |
| 20 cm | 7.874016 in |
| 25 cm | 9.84252 in |
| 50 cm | 19.685039 in |
Meters → Feet
| Meter (m) | Foot (ft) |
|---|---|
| 0.5 m | 1.64042 ft |
| 1 m | 3.28084 ft |
| 2 m | 6.56168 ft |
| 3 m | 9.84252 ft |
| 5 m | 16.404199 ft |
| 10 m | 32.808399 ft |
| 15 m | 49.212598 ft |
| 20 m | 65.616798 ft |
| 25 m | 82.020997 ft |
| 50 m | 164.041995 ft |
Miles → Kilometers
| Mile (mi) | Kilometer (km) |
|---|---|
| 0.5 mi | 0.804672 km |
| 1 mi | 1.609344 km |
| 2 mi | 3.218688 km |
| 3 mi | 4.828032 km |
| 5 mi | 8.04672 km |
| 10 mi | 16.09344 km |
| 15 mi | 24.14016 km |
| 20 mi | 32.18688 km |
| 25 mi | 40.2336 km |
| 50 mi | 80.4672 km |
Conversion Formulas
The exact math behind the most common length conversions.
Understanding Length & Distance Units
Metric vs Imperial Length Units
The metric system (SI) uses meters (m) as the base unit for length. Prefixes like kilo- (km), centi- (cm), and milli- (mm) define multiples and fractions. The metric system is used by most of the world and in all scientific contexts.
The imperial system — used primarily in the United States, UK, and a few others — measures length in inches, feet, yards, and miles. Our converter handles both systems and every combination between them.
Most Common Length Conversions
The most searched length conversions globally are centimeters to inches (clothing sizes), miles to kilometers (travel distances), and meters to feet (height and construction).
Whether you're reading a European shoe size, checking a marathon distance, or planning a room layout, our length converter gives you an instant answer with verified precision.
Specialized Length Units
Beyond everyday units, ConvertNow also supports nautical miles (nmi) used in navigation, furlongs and chains used in land surveying, and astronomical units like light years (ly), parsecs (pc), and astronomical units (AU).
Precision units like micrometers (μm), nanometers (nm), and Ångströms (Å) are essential in science and engineering — and all supported in our converter.
How Accurate Is This Converter?
All length conversions are calculated using verified SI and international inch factors. For example, exactly 1 inch = 2.54 cm by international definition since 1959, and 1 mile = 1,609.344 m by international agreement.
Results are formatted with smart decimal precision — showing only as many decimal places as meaningful, eliminating unnecessary trailing zeros for clean, readable outputs.
Frequently Asked Questions
Frequently Asked Questions
1 Centimeter (cm) equals 0.39370079 Inchs (in).
Multiply the value in Centimeters by 0.39370079. For example, 10 Centimeters = 3.937008 Inchs.
Yes. ConvertNow uses precise factors for all unit calculations. Currency conversions use live exchange rates updated regularly.
Yes — type into the right-hand field to reverse the conversion.