Length Converter
Convert between mm, cm, meters, km, inches, feet, yards, miles and more. Instant results with all-units table.
Common conversions
1 Centimeter =
0.39370079
Inch
1 Centimeter in all units
How to Use
- 1
Enter a value
Type the number you want to convert.
- 2
Select input unit
Choose the unit you are converting from (e.g. km, miles, feet).
- 3
See all results
All equivalent values in every unit update instantly.
How It Works
This tool converts between metric (mm, cm, m, km) and imperial/US (inches, feet, yards, miles) length units, showing an all-units table instantly so you can read off any unit without repeated lookups.
The conversion anchor
All conversions route through meters internally: 1 inch = 2.54 cm exactly (the internationally defined conversion), 1 foot = 30.48 cm, 1 mile = 1.60934 km. Because every unit converts through the same base, results stay consistent across any pair you pick.
Examples
Height conversion
A person who is 5'9" (69 inches) tall is 69 × 2.54 = 175.26 cm, or about 1.75 m.
Road distance
A 26.2-mile marathon is 26.2 × 1.60934 ≈ 42.195 km — the standard marathon distance in metric.
Common Use Cases
- Converting height between cm and feet/inches for forms, fitness apps, or medical records
- Converting recipe or DIY measurements between metric and imperial
- Converting distances for travel, running, or driving between countries using different unit systems
- Construction and land-adjacent measurements needing quick unit lookups
Tips
- For height specifically, remember 1 foot = 12 inches — a common conversion mistake is treating feet and inches as decimal (5.9 feet) instead of converting the decimal portion properly (5 feet 9 inches ≠ 5.9 feet, which is actually 5 feet 10.8 inches).
- The US and UK both use "miles" for road distance while most of the world uses km — double-check which system a distance is quoted in before converting, especially for travel planning.
Frequently Asked Questions
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