Metric and imperial length units
The metric system (millimetres, centimetres, metres, kilometres) is used almost everywhere in the world, while imperial units (inches, feet, yards, miles) remain common in the United States. This converter uses exact conversion factors — for example, 1 inch = 2.54 cm and 1 mile = 1.609344 km — so results are accurate to many decimal places.
Handy reference conversions
1 metre ≈ 3.281 feet, 1 foot = 12 inches = 0.3048 m, 1 kilometre ≈ 0.621 miles, 1 mile = 1760 yards, and 1 yard = 3 feet. Enter any value above to convert between all eight units.
Frequently asked questions
How do I convert metres to feet?
Multiply metres by 3.28084. For example, 5 m = 16.4 ft. Just select metres and feet above and the tool does it for you.
How many centimetres are in an inch?
Exactly 2.54 centimetres per inch.
How do I convert km to miles?
Multiply kilometres by 0.621371, or divide by 1.609344.
Which units does this converter support?
Millimetre, centimetre, metre, kilometre, inch, foot, yard and mile.