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Length Converter

Convert between Millimeter, Centimeter, meter, kilometers, inches, feet, yards, and miles.

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Quick Conversion Table
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Length Conversion Guide – Metric to Imperial Explained

Quick Conversion Cheat Sheet
  • 1 meter (m) = 100 centimeters (cm) = 1,000 millimeters (mm)
  • 1 kilometer (km) = 1,000 meters
  • 1 inch (in) = 2.54 centimeters (cm) — exact
  • 1 foot (ft) = 12 inches (in) = 0.3048 meters — exact
  • 1 yard (yd) = 3 feet (ft) = 0.9144 meters — exact
  • 1 mile (mi) = 5,280 feet (ft) = 1.609344 kilometers — exact

These values follow the international SI standard, ensuring precise and accurate metric–imperial length conversions every time.

How Length Conversion Works

Every conversion in this length calculator uses the meter (m) as the base reference unit. Your value is first converted to meters, and then converted to the target unit. This method ensures consistent, accurate results whether you convert feet to meters, inches to centimeters, or kilometers to miles.

Examples:
10 ft → 10 × 0.3048 = 3.048 m → 120 in
25 cm → 0.25 m → 9.84252 in
When to Use Different Units of Length
  • Millimeters (mm) / Centimeters (cm): ideal for product dimensions, precision measurements, engineering, and small objects.
  • Meters (m) / Kilometers (km): used for everyday measurements, walking distances, road lengths, and mapping.
  • Inches (in) / Feet (ft) / Yards (yd): commonly used in construction, DIY projects, furniture sizes, and U.S./U.K. building systems.
  • Miles (mi): perfect for long-distance road travel, running distances, maps, and geographical measurements used mainly in the U.S. and U.K.

Why Length Conversion is Important

Accurate length conversion is essential for engineers, students, travelers, builders, and anyone dealing with measurements. Whether you are converting meters to feet, kilometers to miles, or inches to centimeters, having a reliable conversion calculator saves time and prevents errors. Our tool supports both imperial and metric system conversions, making it useful for international projects, global studies, and technical work.

Length – Full History