Square meter to acre international

Reference table

How the conversion works

The input is converted into m² using the source factor and offset, then into acre international. This keeps unit definitions consistent across the area collection.

Definitions and sources

Factors are maintained in the versioned unit dataset. Output is rounded to your selected significant digits; calculation uses JavaScript double precision.

• https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b9
• https://www.bipm.org/en/publications/si-brochure

How to use this tool

1. Enter a finite numeric value in square meter.
2. Choose the significant digits for your result.
3. Copy or download the result, including its formula.

Try this example

10

Accuracy and scope

Conversions use fixed unit definitions; results are rounded to floating-point precision.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.