How many hectares is 1 acre?

1 acre equals exactly 0.404686 hectares (to 6 decimal places). The precise value is 1 acre = 4,046.8564 m², and 1 hectare = 10,000 m², giving the ratio 4046.8564 / 10000 = 0.404686.

How many acres is 1 hectare?

1 hectare equals approximately 2.47105 acres. This is the inverse of the standard conversion factor.

Is this conversion exact?

The international acre is defined as exactly 4,046.8564224 m², so the conversion to hectares is exact at 0.40468564224. This tool rounds to 6 significant figures, which is more than sufficient for any practical use.

An acre is a unit of land area commonly used in the United States, United Kingdom, and other countries with historical ties to British measurement. One acre is 43,560 square feet, or about the size of a standard American football field excluding end zones.

A hectare is the standard metric unit for land area, equal to 10,000 square meters (100m × 100m). It is widely used in agriculture and land management worldwide outside the United States.

Can I convert hectares back to acres?

Yes — simply divide hectares by 0.404686 (or multiply by 2.47105). This tool focuses on acres to hectares; for the reverse, divide your hectare value by the same factor.

Acres to Hectares Converter

Name: Acres to Hectares Converter
Availability: InStock
Author: Nham Vu

Type any acreage and instantly see the equivalent in hectares, plus the formula and land-size reference points.

Enter Acres

Acres (ac)

Result in Hectares (ha)

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Land Size Reference

Acres	Hectares	Reference
0.025	0.0101	Average US house lot
1	0.4047	About a city block
2.47	1.0000	1 hectare (100m × 100m)
10	4.047	Small farm field
100	40.47	Medium farm (~0.4 km²)
640	259.0	1 square mile (section)
1,000	404.7	Large ranch / estate

Conversion factor: 1 acre = 0.404686 ha | 1 ha = 2.47105 acres

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Summary

Type any acreage and instantly see the equivalent in hectares, plus the formula and land-size reference points.

How it works

Enter the number of acres in the input field.
The converter multiplies your value by 0.404686 to get hectares.
The result updates instantly as you type.
Copy the result with one click.
Use the reference table to compare your result against familiar land areas.

Use cases

Convert farm or ranch acreage for international property listings.
Translate US land survey measurements into metric units.
Calculate plot sizes for agricultural planning in metric countries.
Compare land areas when reading real-estate documents from different regions.
Convert national park or nature reserve sizes for research.
Check acreage on deeds against metric land records.

Frequently Asked Questions

Last updated: 2026-06-09 · Reviewed by Nham Vu