Length and Distance Converters
Online Length & Distance Conversion Calculators
Convert any unit of distance and length accurately between the metric and imperial systems. Whether you need architectural precision in millimeters, everyday measurements in feet and inches, or transit calculations across kilometers and statute miles, our tools deliver instant, exact results.
Supported Units of Length
- Metric Units: Millimeters (mm), Centimeters (cm), Meters (m), Kilometers (km)
- Imperial & US Customary Units: Inches (in), Feet (ft), Yards (yd), Statute Miles (mi)
- Maritime & Aviation: Nautical Miles (nmi)
Popular Length Conversions
| Conversion Pair | Standard Ratio / Formula | Typical Application |
|---|---|---|
| Meters to Feet | 1 m ≈ 3.28084 ft | Architecture, room sizes, running track |
| Feet to Meters | 1 ft = 0.3048 m | Aviation altitude, construction |
| Inches to Centimeters | 1 in = 2.54 cm | Screen sizes, clothing, manufacturing |
| Miles to Kilometers | 1 mi = 1.609344 km | Road trips, vehicle speeds, marathon pacing |
| Centimeters to Inches | 1 cm ≈ 0.3937 in | Product dimensions, fabric sewing |
Frequently Asked Questions
What is the international base unit for length?
The meter (m) is the base unit of length in the International System of Units (SI), defined by the distance light travels in a vacuum in 1/299,792,458 of a second.
How many centimeters are in an inch?
By international agreement adopted in 1959, 1 inch is defined as exactly 2.54 centimeters.