Length Converter

The metre (m) is the base unit of length in the International System of Units (SI). Originally defined as one ten-millionth of the distance from the equator to the North Pole, the metre is now defined by the speed of light in vacuum. It is used worldwide for everyday measurements, construction, and science.

The centimetre (cm) is a metric unit of length equal to one hundredth of a metre. Commonly used for measuring body height, clothing sizes, and small objects. One centimetre equals 10 millimetres or approximately 0.394 inches.

The decimetre (dm) is a metric unit equal to one tenth of a metre or 10 centimetres. While less commonly used in everyday life, it appears in scientific contexts and in some European countries for measuring small distances.

The millimetre (mm) is a metric unit equal to one thousandth of a metre. It is widely used in engineering, manufacturing, and medicine for precise measurements. Standard paper thickness is typically measured in millimetres.

The kilometre (km) is a metric unit equal to 1,000 metres. It is the standard unit for measuring road distances, travel distances, and geographic scales in most countries outside the United States. One kilometre equals approximately 0.621 miles.

The nanometre (nm) is a metric unit equal to one billionth of a metre. It is used in nanotechnology, semiconductor manufacturing, and measuring wavelengths of light. A human hair is approximately 80,000 to 100,000 nanometres wide.

The inch (in) is an imperial unit of length equal to exactly 25.4 millimetres. Commonly used in the United States, United Kingdom, and Canada for measuring screen sizes, paper dimensions, and construction materials.

The foot (ft) is an imperial unit equal to 12 inches or 0.3048 metres. It is widely used in the United States for measuring height, room dimensions, and altitude in aviation. One foot equals approximately 30.48 centimetres.

The yard (yd) is an imperial unit equal to 3 feet or 0.9144 metres. It is used primarily in the United States and United Kingdom for measuring fabric, football fields, and golf courses.

The mile (mi) is an imperial unit equal to 5,280 feet or 1,609.344 metres. It is the standard unit for measuring road distances in the United States, United Kingdom, and a few other countries. One mile equals approximately 1.609 kilometres.

The nautical mile (nmi) is a unit based on the circumference of the Earth, equal to 1,852 metres. It is the standard unit in maritime and air navigation. One nautical mile corresponds to one minute of latitude along any meridian.