How to Convert Length Units
Length is the most frequently converted measurement in the world. Whether you are checking a product size listed in centimeters, reading a road sign in kilometers or following a DIY plan in inches, this free length converter gives you an instant, accurate answer. It supports both metric units (millimeter, centimeter, meter, kilometer) and imperial units (inch, foot, yard, mile), all based on the internationally agreed definition of 1 inch = 2.54 centimeters exactly.
Common Length Conversion Factors
| Conversion | Result |
|---|---|
| 1 inch | 2.54 centimeters |
| 1 foot | 30.48 centimeters (0.3048 m) |
| 1 yard | 0.9144 meters |
| 1 mile | 1.609344 kilometers |
| 1 meter | 3.28084 feet (39.3701 inches) |
| 1 kilometer | 0.621371 miles |
Quick mental math: to convert centimeters to inches, divide by 2.5 for a rough answer. To convert kilometers to miles, multiply by 0.6. To convert meters to feet, multiply by 3.3.
Frequently Asked Questions
How many centimeters are in an inch?
There are exactly 2.54 centimeters in one inch. So 10 cm equals 3.937 inches.
How do I convert meters to feet?
Multiply the number of meters by 3.28084. For example, 2 meters equals 6.562 feet.
How many kilometers is a mile?
One mile equals 1.609344 kilometers, so 5 miles is about 8.05 km.
Also try the weight converter, area converter or speed converter.