Length Unit Converter

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Length Conversion for All Needs

Convert between metric and imperial length units with precision. Our length converter supports all common units including meters, centimeters, feet, inches, kilometers, miles, yards, and more specialized units like nanometers and light-years. All conversions are based on the latest ISO 80000 standards for maximum accuracy.

Common Length Conversions

  • 1 inch = 2.54 centimeters (exact)
  • 1 foot = 30.48 centimeters (exact)
  • 1 yard = 0.9144 meter (exact)
  • 1 meter = 3.28084 feet
  • 1 mile = 1.60934 kilometers
  • 1 nautical mile = 1.852 kilometers (exact)

Length Units and Standards

The meter (m) is the SI base unit for length, defined by the distance light travels in a vacuum during 1/299,792,458 of a second.

  • Nanometer (nm): 10-9 meters
  • Micrometer (μm): 10-6 meters
  • Millimeter (mm): 10-3 meters
  • Centimeter (cm): 10-2 meters
  • Kilometer (km): 103 meters

Understanding Length Measurements

Length measurements are among the most commonly used units in everyday life and scientific applications. The metric system uses the meter as its base unit, while the imperial system relies on feet and inches. Our converter makes it easy to translate between these different systems with precision.

Precision: 15 decimal places
Standard: ISO 80000-3:2019

Length Units in Different Systems

Metric Length Units

The metric system uses powers of 10 with standard prefixes:

  • Kilometer (km): 1,000 meters
  • Meter (m): Base unit
  • Decimeter (dm): 0.1 meter
  • Centimeter (cm): 0.01 meter
  • Millimeter (mm): 0.001 meter

Imperial Length Units

The imperial system uses a mix of conversion factors:

  • Mile: 5,280 feet or 1,760 yards
  • Yard: 3 feet or 36 inches
  • Foot: 12 inches
  • Inch: Base unit for small measurements