Length Converter - Meter, cm, km, Feet, Inch
Convert length units between meter, centimeter, millimeter, inch, foot, yard, mile, nautical mile, micrometer, and more. Fast and accurate length unit conversion for construction, engineering, science, and everyday measurements. Supports metric and imperial systems.
Length Conversion Factors
1 m = 100 cm = 0.001 km = 3.281 ft = 39.37 inVariables:
- 1 kmKilometerKilometer(e.g.: = 1000 m = 0.621 mile)
- 1 mMeter (SI unit)Meter (SI unit)(e.g.: = 100 cm = 3.28 ft)
- 1 cmCentimeterCentimeter(e.g.: = 10 mm = 0.394 inch)
- 1 mileMileMile(e.g.: = 1.609 km = 5280 ft)
- 1 ftFeetFeet(e.g.: = 12 inch = 30.48 cm)
- 1 inInchInch(e.g.: = 2.54 cm)
How to Use the KalkuLab Length Converter
- 1
Enter a Value
Input the length value you want to convert.
- 2
Select Source Unit
Choose the unit: m, cm, km, mile, ft, inch, etc.
- 3
View Results
Conversions to all supported units are displayed.
Examples
Height: cm to Feet and Inches
Problem:
Convert 170 cm to feet and inches.
Solution:
- 1.170 cm ÷ 2.54 = 66.93 inch
- 2.66.93 ÷ 12 = 5.58 feet
- 3.= 5 feet + 0.58 × 12 inch
Result:5 feet 7 inches (5'7")
170 cm is approximately 5 feet 7 inches.
Kilometers to Miles
Problem:
How many miles is 10 km?
Solution:
- 1.1 km = 0.621371 mile
- 2.10 km = 10 × 0.621371
Result:6.21 miles
A marathon (42.195 km) = 26.2 miles.
Meters to Centimeters
Problem:
A table is 1.5 m long. How many cm is that?
Solution:
- 1.1 m = 100 cm
- 2.1.5 m = 1.5 × 100
Result:150 cm
Simply multiply meters by 100 to get centimeters.
Frequently Asked Questions
Which is longer: a kilometer or a mile?
1 mile is longer than 1 km. 1 mile = 1.609 km, so 1 km ≈ 0.62 mile.
Why are there metric and imperial systems?
The metric system (meter) was developed in France in the 1790s using decimals. Imperial units (feet, inches) are older and based on historical practice. The US still predominantly uses imperial.
How do you remember common conversions?
Memorize: 1 inch ≈ 2.5 cm (exactly 2.54), 1 foot ≈ 30 cm, 1 meter ≈ 3.3 feet, 1 km ≈ 0.6 mile, 1 mile ≈ 1.6 km.
What length units are used in astronomy?
For very large distances: AU (Astronomical Unit) ≈ 150 million km (Earth–Sun distance). Light-year ≈ 9.46 trillion km. Parsec ≈ 3.26 light-years.