Length and Distance Converter — Free Online
Convert length and distance units online for free. Supports metres, feet, inches, miles, kilometres, yards, centimetres, and nautical miles. Instant results.
About Length Converter
Our length converter handles all common units of length and distance measurement in one place. Convert between the metric system (millimetres, centimetres, metres, kilometres), imperial and US customary units (inches, feet, yards, miles), and specialist units (nautical miles, light-years). Enter a value in any unit and all other unit equivalents are shown simultaneously. Useful for international travel, engineering projects, home improvement, fitness tracking, and converting measurements in recipes, maps, and academic work.
Frequently Asked Questions
What length units are supported?
Millimetre, centimetre, metre, kilometre, inch, foot, yard, mile, nautical mile, and light-year.
How many centimetres in an inch?
1 inch = 2.54 centimetres exactly.
How many kilometres in a mile?
1 mile = 1.60934 kilometres. Conversely, 1 kilometre = 0.621371 miles.
Can I convert from imperial to metric for travel?
Yes — great for converting distances on US road signs to kilometres for metric-country visitors.
Does it support scientific units like light-years?
Yes — astronomical units and light-years are included for scientific and educational use.