📏
Length Converter
Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles
Conversion Results
Metric Units
Millimeter
1,000
mm
Centimeter
100
cm
Meter
1
m
Kilometer
0.001
km
Imperial Units
Inch
39.3701
in
Foot
3.2808
ft
Yard
1.0936
yd
Mile
0.00062137
mi
Quick Reference
1 Inch = 2.54 cm
1 Foot = 30.48 cm
1 Yard = 0.9144 m
1 Mile = 1.609 km
1 m = 100 cm = 1,000 mm
1 km = 1,000 m
📖 How to Use
- Enter the value to convert
- Select the unit of your input value
- View real-time conversion results in all units
✨ Features
- ✓8 length units supported
- ✓Metric and Imperial units side by side
- ✓Real-time automatic calculation
- ✓Precise decimal handling
- ✓Support for large and small numbers
📐 Formula
Converted value = Input × (input unit→meter factor) ÷ (output unit→meter factor)💡 How It Works
- •The meter (m) is the base unit of length in the International System of Units (SI).
- •One meter is defined as the distance light travels in vacuum in 1/299,792,458 seconds.
- •Kilometer (km) = 1,000m, Centimeter (cm) = 0.01m, Millimeter (mm) = 0.001m.
- •In the Imperial system, 1 inch is defined as exactly 2.54 cm.
- •1 foot (ft) = 12 inches (30.48 cm), 1 yard = 3 feet (91.44 cm).
- •1 mile = 5,280 feet, approximately 1.609 km.
❓ FAQ
Q. What's the difference between Metric and Imperial?
A. Metric is a decimal-based international standard, while Imperial is a traditional system used mainly in the US and UK.
Q. How many cm is 1 inch?
A. 1 inch is exactly 2.54 cm, as defined by international agreement in 1959.
Q. How long is a marathon?
A. A marathon is 42.195 km, which is about 26.2 miles.
Q. How is TV/monitor size measured in inches?
A. Screen size is the diagonal length in inches. For example, a 55-inch TV has a 139.7 cm diagonal.