Length Converter

Multiply the number of meters by 3.28084. For example, 10 meters × 3.28084 = 32.8084 feet. Alternatively, you can multiply by 3.281 for a quick approximation. Remember: 1 meter is about 3 feet 3 inches.

Multiply the number of feet by 0.3048 to get meters. For example, 10 feet × 0.3048 = 3.048 meters. This works because 1 foot is exactly 0.3048 meters by international agreement.

There are exactly 2.54 centimeters in one inch. This is a defined relationship (not measured), established by international agreement in 1959. So 10 inches = 25.4 cm, 12 inches (1 foot) = 30.48 cm.

Multiply kilometers by 0.621371 to get miles. For example, 100 km × 0.621371 = 62.1371 miles. Quick approximation: multiply by 0.6 or divide by 1.6. A marathon (42.195 km) is about 26.2 miles.

A nautical mile equals 1.852 kilometers or about 1.151 statute miles. It's defined as one minute of arc along any meridian (great circle of Earth). Used primarily in aviation and maritime navigation because it relates directly to latitude.

The US adopted the British Imperial system during colonization and never fully converted to metric, despite the Metric Conversion Act of 1975. Metric is used in science and medicine, but everyday measurements remain imperial due to infrastructure, manufacturing standards, and cultural familiarity.

6 feet equals 182.88 centimeters (approximately 183 cm). Calculation: 6 feet × 30.48 cm/foot = 182.88 cm. This is a common height conversion since most of the world uses centimeters for height.

The smallest commonly used unit is the nanometer (one billionth of a meter), used for molecules and computer chips. The largest is the light-year (about 9.461 trillion km), used for astronomical distances. Even larger is the parsec (3.26 light-years).