How to Use the Length Converter
This tool supports instant conversion between metric and imperial length units. Simply select the source unit (e.g., centimeters) from the "From Unit" dropdown, choose the desired target unit (e.g., inches) from the "To Unit" dropdown, and enter a value. The result is displayed instantly. You can also click "Swap Units" to quickly reverse the conversion direction.
Supported units: Millimeter (mm), Centimeter (cm), Meter (m), Kilometer (km), Inch (in), Foot (ft), Yard (yd), Mile (mi).
Common Length Conversions
| Conversion | Value |
|---|---|
| 1 Inch (in) | = 2.54 Centimeters (cm) |
| 1 Foot (ft) | = 30.48 Centimeters (cm) |
| 1 Yard (yd) | = 91.44 Centimeters (cm) |
| 1 Mile (mi) | = 1.609344 Kilometers (km) |
| 1 Meter (m) | = 3.28084 Feet (ft) |
| 1 Kilometer (km) | = 0.621371 Miles (mi) |
| 1 Centimeter (cm) | = 10 Millimeters (mm) |
Length Conversion Examples
Height Conversion
170 cm = 5 feet 6.93 inches (approx. 5'7")
180 cm = 5 feet 10.87 inches (approx. 5'11")
Distance Conversion
1 km = 1,000 m = 0.621 miles
42.195 km (marathon) = 26.219 miles
Everyday Lengths
1 inch = 2.54 cm (commonly used for screen sizes)
27-inch monitor diagonal = 68.58 cm
Notes
- This tool only supports common metric and imperial length units. Astronomical units (AU, light-year, parsec) are not included.
- Nautical units (nautical mile, knot) are not covered. Please use a dedicated tool for nautical conversions.
- The imperial "feet + inches" notation (e.g., 5'7") is not directly supported. Results are shown as decimal feet or inches; you may need to split the integer and remainder manually.
- Results are displayed with up to 8 decimal places. For higher precision, refer to the official International System of Units definitions.
Frequently Asked Questions
How many centimeters is one foot?
1 foot equals 30.48 centimeters (cm). The foot is a basic imperial unit of length commonly used to express height in Western countries. For example, 6 feet = 182.88 cm.
How many centimeters is one inch?
1 inch equals exactly 2.54 centimeters (cm). This exact value was defined by international agreement in 1959. Inches are commonly used for screen sizes and pipe diameters.
How many kilometers is one mile?
1 mile equals 1.609344 kilometers (km). The mile is commonly used in the US and UK for road distances and speed limits. For example, 60 mph = 96.56 km/h.
How do I convert height from centimeters to feet and inches?
Divide the centimeters by 30.48 to get decimal feet. Take the integer part as feet, then multiply the remainder by 12 to get inches. For example, 175 cm ÷ 30.48 = 5.741 feet; 5 feet with a remainder of 0.741 × 12 = 8.89 inches, so 175 cm is approximately 5 feet 9 inches.
What is the difference between centimeters and millimeters?
1 centimeter (cm) = 10 millimeters (mm). Centimeters are one of the most common length units in daily life, while millimeters are used when higher precision is needed, such as in engineering drawings and machining.