A 20 mu land listing is roughly 3.3 acres.
In metric terms, 20 mu is about 1.33 hectares.
Use square meters or hectares for official comparisons.
This page uses the modern mainland definition.
This page answers one specific search intent. For a full table, reverse conversion, nearby units or a live calculator input, use the linked main converter.
When a Chinese listing includes both a label and a metric value, use the metric value first. Labels are useful shortcuts, but centimeters, kilograms and square meters are easier to verify.
For modern mainland China, land-area pages use 1 mu = 666.67 square meters. That is reliable for ordinary farmland and property listings, but legal or historical land records still need source context.
For the broader chart and source caveats, read the Chinese units conversion chart. It explains when jin, catty, mu, li, chi, cun and related units are safe to convert with modern mainland values.