Length Converter
Convert between meters, kilometers, miles, feet, inches and centimeters instantly.
📏 Length Converter
Length Converter — Free Online Unit Converter
Convert between all common length and distance units instantly with our free online converter. Metres, kilometres, centimetres, millimetres, feet, inches, yards, miles, nautical miles — enter a value in any unit and see all conversions simultaneously. No account required.
Length conversions are needed daily — from understanding international measurements to working in construction, science, travel, fitness, or cooking. The metric and imperial systems use completely different units, making conversions essential when working between countries or industries.
Supported Length Units
- Metric: millimetres, centimetres, metres, kilometres
- Imperial/US: inches, feet, yards, miles
- Nautical: nautical miles
- Scientific: micrometres, nanometres, light-years
Common Length Conversions
- 1 metre = 3.281 feet = 39.37 inches
- 1 kilometre = 0.621 miles
- 1 mile = 1.609 kilometres
- 1 inch = 2.54 centimetres
- 1 foot = 30.48 centimetres
How to Convert Length Units — Step by Step
- Select input unit: Choose the unit of your measurement from the dropdown.
- Enter value: Type the length or distance you want to convert.
- View all results: See conversions in all supported units instantly.
- Copy any result: Click to copy a specific conversion value.
- Convert another: Change the value or unit for a new conversion.
❓ Frequently Asked Questions
1 inch = 2.54 centimetres exactly. This is a defined constant — not an approximation.
Multiply miles by 1.60934. For example, 5 miles = 5 × 1.60934 = 8.047 km.
A nautical mile (1,852 metres) is used in maritime and aviation navigation. It's based on one minute of arc of latitude.
There is no difference — UK and US miles are both exactly 1,760 yards or 1,609.344 metres.
Yes, 100% free with no account required.
Yes — micrometres, nanometres, and angstroms are included for scientific use.
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