Free online calculator · Conversion
Length Converter
Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards and miles.
Formula • Worked example • Interpretation
Convert length and distance units
Convert measurements such as feet, inches, meters, kilometers and miles using fixed unit relationships.
Calculation method
To convert, multiply the source quantity by its unit-to-base-unit factor, then divide by the target unit factor.
Worked example
1 international mile = exactly 1.609344 kilometers; 12 inches = exactly 1 foot.
What your result means
Do not round intermediate values if you need precision, especially when chaining several unit conversions.
Tips for better calculations
For travel, check that “mile” and “kilometer” correspond to the units on the route or vehicle display.
Assumptions and limitations
A unit name can refer to regional or historical conventions. This converter uses standard modern metric/imperial factors and is not a surveying-grade instrument.
Additional reference: NIST — SI and metric system resources
SiCalcs tools provide estimates and educational calculations; they do not replace professional financial, medical, tax, or legal advice.