Acre to Hectare Converter

Convert between acres and hectares instantly — no signup, nothing sent to a server.

Edit either field — the other updates automatically. 1 acre = 0.404686 ha.

Formula, conversion table & examples

Formula

ha = ac × 0.405

ac = ha ÷ 0.405

Acres to Hectares conversion table

Acres (ac) Hectares (ha)
1 0.405
5 2.023
10 4.047
50 20.234
100 40.469
500 202.343

Worked examples

  • 1 ac = 1 × 0.405 = 0.405 ha
  • 5 ac = 5 × 0.405 = 2.023 ha
  • 202.343 ha back to Acres: 202.343 ÷ 0.405 = 500 ac

How to convert acres to hectares

  1. 1

    Enter a value in either field

    Type an area into the acres field, or the hectares field — either direction works.

  2. 2

    Read the converted value

    The other field updates instantly as you type.

  3. 3

    Adjust as needed

    Keep editing either field to try different land areas.

Example use cases

1

Real estate & land listings

Convert land or farm listings between acres and hectares for buyers used to different systems.

2

Agriculture & farming

Convert field or crop area between acres and hectares for planning or yield calculations.

3

Forestry & conservation

Convert reported land area figures between the two common area units.

4

Urban planning

Convert plot or zoning area between acres and hectares for cross-region comparisons.

Frequently asked questions

How do I convert acres to hectares?

Multiply the area in acres by 0.404686. For example, 1 acre × 0.404686 ≈ 0.4 ha.

How do I convert hectares to acres?

Divide the area in hectares by 0.404686, or multiply by 2.47105. For example, 0.4 ha × 2.47105 ≈ 1 acre.

Where does 0.404686 come from?

One acre is defined as 4,840 square yards, which works out to almost exactly 4,046.86 square meters, or 0.404686 hectares.

Is anything I type sent to a server?

No. Every conversion runs entirely in your browser — nothing is transmitted or logged.