Length Conversions
Convert length and distance units — meters, feet, inches, miles, and more. Free calculators with conversion tables and formulas for construction, travel, and engineering.
10 units · 8 conversions
Length measures how far one point is from another. Different countries and industries use different units: metric units like meters and kilometers dominate science and most of the world, while feet, inches, and miles remain common in the United States and in construction trades.
Converting length units requires a fixed multiplier — unlike temperature, there is no offset. One foot always equals 0.3048 meters. Our calculators apply standard international factors so you get consistent results whether you are reading a blueprint, planning a road trip, or comparing product dimensions online.
Popular length conversions
Real-world example
A furniture listing shows shelf depth in centimeters but your room is measured in inches. Converting 45 cm to inches (≈ 17.7 in) tells you immediately whether the shelf fits without guessing or rounding errors.
All length conversions
Length units explained
- Millimeters (mm)
- Also: millimeters
- Centimeters (cm)
- Also: centimeters
- Meters (m) · base unit
- Also: meters
- Kilometers (km)
- Also: kilometers
- Inches (in)
- Also: inches, "
- Feet (ft)
- Also: feet, '
- Yards (yd)
- Also: yards
- Miles (mi)
- Also: miles
- Nautical Miles (nmi)
- Also: nautical miles
- Light Years (ly)
- Also: light years
Frequently asked questions
- What is the most common length conversion?
- Inches to centimeters and feet to meters are among the most searched length conversions, especially for shopping, DIY projects, and travel between metric and US customary systems.
- How many feet are in a meter?
- One meter equals approximately 3.28084 feet. To convert meters to feet, multiply by 3.28084.