Length Converter
Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles in real time.
Quick Reference
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Free Length Converter
This converter supports metric and imperial length units in one place. Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles instantly.
How It Works
Each input is converted through a shared base unit (meters), then converted to your target unit. This keeps all pairwise conversions accurate and consistent.
Common Length Conversion Formulas
1 in = 2.54 cm, 1 ft = 0.3048 m, 1 yd = 0.9144 m, and 1 mi = 1.609344 km. You can also use fractional input such as 5 3/4 where useful.
When This Tool Is Useful
Use it for construction and DIY planning, apparel sizing, screen dimensions, travel distances, and any workflow that mixes metric and imperial measurements.
Frequently Asked Questions
What units are supported?
Millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles.
How many centimeters are in one inch?
Exactly 2.54 centimeters.
How do you convert feet to meters?
Multiply feet by 0.3048.
How do you convert miles to kilometers?
Multiply miles by 1.609344.
Can I use fractional values like 5 3/4?
Yes. Fraction and mixed-number input is supported.