How it works
Area factors are squared length factors. One square metre equals 10,000 square centimetres, and one hectare equals 10,000 square metres.
Result = value × source factor / target factor
Worked example
Show example inputs and result
Value: 100 · From unit: m² · To unit: cm².
- Converted value
- 1,000,000 cm²
Questions and answers
Which acre is used?
The international acre is 4,046.8564224 square metres. Historic local land units are not included.
Why are some results rounded?
Results display up to 8 decimal places. Calculations use the unrounded values; very small values use scientific notation. JavaScript floating-point arithmetic can introduce tiny rounding differences.
Are my inputs sent to a server?
The calculator processes inputs in your browser. Its code does not send your values to a server.
Conversion reference: NIST SI Guide
Method reviewed: October 8, 2026 · Methods & accuracy