Length Converter

1. Type any value. Enter a number in any unit field. All 9 units update simultaneously. There is no button to press.
2. Switch starting unit freely. Want feet from miles? Type in the miles field. Want meters from inches? Type in the inches field. Any field works as the input.
3. Read all conversions at once. All unit fields show the equivalent value, so you can compare kilometers, miles, and nautical miles side by side without switching.
4. Use decimals for precision. Enter fractional values like 1.5 or 0.25. The converter handles very large numbers (distance between cities) and very small ones (component dimensions in millimeters) equally well.

Example: a marathon is 42.195 km. Type 42.195 in the Kilometer field and instantly see: 42,195 m, 26.2188 mi, 46,145.7 yd, 138,435 ft, 1,661,220 in, 22.7841 nmi.

All conversions go through meters as the base unit:

Value in meters = Input × toMeters factor
Result in target unit = Value in meters ÷ toMeters factor

Key reference points: 1 foot = 12 inches exactly. 1 yard = 3 feet exactly. 1 mile = 5,280 feet = 1,760 yards. 1 nautical mile was originally defined as 1 arc-minute of latitude, making it essential for marine and air navigation.