Supported Length & Distance Units
- Kilometer (km): 1,000 meters — metric standard for long distances.
- Meter (m): Base SI unit of length.
- Centimeter (cm): 1/100 of a meter — used in everyday dimensions.
- Millimeter (mm): 1/1,000 of a meter — precise measurements & manufacturing.
- Mile (mi): 5,280 feet or 1,609.344 meters — imperial road distance standard.
- Yard (yd): 3 feet or 36 inches (0.9144 m).
- Foot (ft): 12 inches or 0.3048 m.
- Inch (in): 2.54 centimeters — standard imperial unit.
How Length & Distance Conversion Works
Length conversions rely on linear scaling. Metric units use powers of 10 (1 m = 100 cm = 1,000 mm = 0.001 km), while imperial units use fixed definitions like 1 inch = exactly 2.54 centimeters (0.0254 m).
Frequently Asked Questions
How many centimeters are in an inch?
There are exactly 2.54 centimeters in 1 inch.
How do I convert kilometers to miles?
Multiply kilometers by 0.621371, or divide by 1.609344. For example, 10 km × 0.621371 = 6.21 miles.
What is the base SI unit of length?
The meter (m) is the fundamental SI unit of length.