📏 Length Units

Metric · Imperial · Chinese units

🔐 Local processing
Length Unit Converter

Enter a value in any field and all other units update automatically; base unit is the meter. Chinese units use mainland definitions (1 li = 500 m, 1 m = 3 chi).

ℹ️ Mechanical "si" (丝) is counted as 0.01 mm.

About this tool

Switch between metric and imperial length units for construction, travel, or homework. Type a value and pick units for instant conversion.

Which length units are supported?

Common units include mm, cm, m, km, inch, foot, yard, and mile.

How precise are results?

Results use standard conversion factors; very long decimals may be rounded for display.