# Acres to Hectares Converter

Convert acres to hectares, square meters, square feet, and square miles. Accurate area conversion for real estate, agriculture, and land measurement.

## What this calculates

Convert acres to hectares and other area units instantly. Acres are the standard land measurement in the United States and United Kingdom, while hectares are used in most other countries and in scientific contexts.

## Inputs

- **Acres** (ac) — min 0 — Enter the area in acres.

## Outputs

- **Hectares** (ha) — Area in hectares.
- **Square Meters** (m²) — Area in square meters.
- **Square Feet** (ft²) — Area in square feet.
- **Square Miles** (mi²) — Area in square miles.

## Details

An acre is defined as exactly 43,560 square feet, and a hectare is exactly 10,000 square meters. The conversion factor between them is derived from the international foot definition (1 ft = 0.3048 m exactly).

Exact conversion factors

- 1 acre = 0.40468564224 hectares

- 1 acre = 4,046.8564224 square meters

- 1 acre = 43,560 square feet (by definition)

- 640 acres = 1 square mile (by definition)

- 1 hectare = 2.47105381467 acres

Quick Reference Table

Acres
Hectares
Square Meters
Square Feet

0.25
0.1012
1,011.71
10,890

0.5
0.2023
2,023.43
21,780

1
0.4047
4,046.86
43,560

5
2.0234
20,234.28
217,800

10
4.0469
40,468.56
435,600

100
40.4686
404,685.64
4,356,000

640
259.00
2,590,000
27,878,400

One acre is roughly the size of a football field (which is 1.32 acres including end zones). A hectare is about 2.47 acres, or roughly the size of two football fields.

## Frequently Asked Questions

**Q: How many hectares is 1 acre?**

A: One acre equals exactly 0.40468564224 hectares. This is commonly rounded to 0.4047 hectares for practical purposes.

**Q: How big is an acre in everyday terms?**

A: An acre is 43,560 square feet, which is roughly 209 feet by 209 feet (a square about 64 meters on each side). It is slightly smaller than a standard American football field (which is about 1.32 acres including end zones).

**Q: Why are acres still used instead of hectares?**

A: Acres remain the standard land measurement in the United States, United Kingdom, and several other countries due to historical tradition. Hectares are preferred in most other countries and in international scientific and agricultural contexts.

**Q: How many acres in a square mile?**

A: There are exactly 640 acres in one square mile. This relationship is exact by definition and dates back to English land measurement systems.

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Source: https://vastcalc.com/calculators/conversion/acres-to-hectares
Category: Conversion
Last updated: 2026-04-21