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Acres to Hectares

Convert acre to ha quickly with this free online calculator. The page explains the conversion rule, gives practical examples and provides a quick reference table.

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CONVERTED RESULT—
Decimal places
CONVERSION RULE

1 acre equals 0.40468564224 hectares.

How to use the Acres to Hectares

  1. Enter the number you want to convert.
  2. Confirm the source unit shown beside the input.
  3. Choose decimal precision if you need more or less detail.
  4. Read the converted result.
  5. Copy the result when you need to use it elsewhere.

How the conversion works

1 acre equals 0.40468564224 hectares.

For a simple fixed-factor conversion, the calculator multiplies the entered value by the stated factor. Temperature scales and certain specialized tools use their specific mathematical relationship instead.

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Common acre to ha conversions

acreha
1 acre0.404686 ha
2 acre0.809371 ha
5 acre2.023428 ha
10 acre4.046856 ha
20 acre8.093713 ha
50 acre20.234282 ha

Example

For example, entering 1 acre gives approximately 0.404686 ha using the rule above. Change the input to test your own value.

Frequently asked questions

The Acres to Hectares converts a value from acre to ha using the conversion relationship described on this page.
Enter your value, review the source and destination units, choose the decimal precision and read or copy the result.
1 acre equals 0.40468564224 hectares.
Use enough precision for your purpose. Everyday estimates usually need fewer decimal places; technical work may require more.
It can be a useful reference calculation, but safety-critical, regulated, contractual or specialized work should be verified against the applicable authoritative standard.

Accuracy note: This calculator is a practical reference. For regulated, safety-critical or specialized work, verify the result against the applicable standard.

Page reviewed: August 24, 2026.