3 chi is about 100 cm.
6 chi is about 200 cm or 78.7 inches.
This uses the modern mainland value based on 1 chi = 1/3 meter.
Historical chi values can differ.
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, length pages use metric anchors such as 1 chi = 33.33 cm and 1 cun = 3.333 cm. Historical architecture or older texts can use different values.
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.