Length Conversion Calculator
Convert between metric, imperial, and nautical length units. Supports kilometers, meters, miles, feet, inches, and many more units.
Conversion Parameters
Select units and enter the value to convert
Result
Converted length value
Enter a value and select units, then click "Convert" to see the result
Common Conversions
Metric to Imperial
1 km = 0.621371 mi
1 m = 3.28084 ft
1 cm = 0.393701 in
1 mm = 0.0393701 in
Imperial to Metric
1 mi = 1.60934 km
1 ft = 0.3048 m
1 in = 2.54 cm
1 yd = 0.9144 m
Nautical
1 nmi = 1.852 km
1 nmi = 1.15078 mi
1 nmi = 6076.12 ft
Unit Categories
Metric System
Based on powers of 10, used worldwide in science and most countries.
Base unit: Meter (m)
Imperial System
Traditional system used primarily in the United States and some other countries.
Base unit: Yard (yd)
Nautical Units
Specialized units used in maritime and aviation navigation.
Base unit: Nautical Mile (nmi)