Length Converter
Convert between metric and imperial length units — meters, feet, miles, and more.
Picometer (pm)
1000000000000
Nanometer (nm)
1000000000
Micrometer (μm)
1000000
Millimeter (mm)
1000
Centimeter (cm)
100
Meter (m)
1
Kilometer (km)
0.001
Inch (in)
39.3700787
Foot (ft)
3.2808399
Yard (yd)
1.0936133
Mile (mi)
0.000621371192
Nautical Mile (nmi)
0.000539956803
Light Year (ly)
1.05697e-16
Astronomical Unit (AU)
6.68449e-12
About This Tool
The Length Converter converts instantly between 14 units, from picometers to light years.
Length units are used across science, construction, navigation, and daily life. Quickly convert between metric and imperial units.
How to Use
- Enter a numeric value in the Value field.
- Select the source unit from the From Unit dropdown.
- Read all equivalent values instantly in the results grid.
- Change the value or unit at any time — results update in real time.
Reference
- 1 inch = 2.54 cm = 0.0254 m
- 1 foot = 12 inches = 0.3048 m
- 1 mile = 5,280 ft = 1.60934 km
- 1 nautical mile = 1.852 km = 1.15078 mi
Use Cases
Architects convert feet/inches to meters. Travelers convert miles to kilometers. Scientists work with extreme scales like nanometers or light years.
FAQ
- How many centimeters are in an inch? — 1 inch = 2.54 cm. 1 foot = 30.48 cm. 1 yard = 91.44 cm.
- What is the difference between miles and kilometers? — 1 mile = 1.60934 km. Multiply miles by 1.6 to approximate kilometers.
- What is a nautical mile? — A nautical mile (nmi) is used in navigation and equals 1 minute of latitude. 1 nmi = 1.852 km ≈ 1.151 mi.