Acres to Hectares Conversion Chart
Quick-reference chart converting acres (ac) to hectares (ha). Covers 0.25 to 10,000 acres — for land purchases, farming, real estate, and construction projects.
For a custom value not in this chart, use the interactive Acre to Hectare converter.
| Acre (ac) | Hectare (ha) |
|---|---|
| ¼ ac | 0.101171 ha |
| ½ ac | 0.202343 ha |
| 1 ac | 0.404686 ha |
| 2 ac | 0.809371 ha |
| 5 ac | 2.02343 ha |
| 10 ac | 4.04686 ha |
| 20 ac | 8.09371 ha |
| 25 ac | 10.1171 ha |
| 40 ac | 16.1874 ha |
| 50 ac | 20.2343 ha |
| 100 ac | 40.4686 ha |
| 160 ac | 64.7497 ha |
| 200 ac | 80.9371 ha |
| 320 ac | 129.499 ha |
| 500 ac | 202.343 ha |
| 640 ac | 258.999 ha |
| 1000 ac | 404.686 ha |
| 2000 ac | 809.371 ha |
| 5000 ac | 2023.43 ha |
| 10000 ac | 4046.86 ha |
Conversion Formula
ha = acres × 0.404686 acres = ha × 2.47105 1 acre = 43,560 sq ft = 4,046.86 m² = 0.404686 ha 1 hectare = 10,000 m² = 2.47105 acres Land area reference: 1 acre = 0.405 ha (standard US residential lot ≈ 0.2–0.5 ac) 5 acres = 2.023 ha (small hobby farm) 40 acres = 16.19 ha (USDA farm census smallest unit) 160 acres = 64.75 ha (1 US quarter section = 160 ac) 640 acres = 259.0 ha (1 square mile = 640 ac) Quick estimate: multiply acres by 0.4 ≈ ha (within 1.2%)
Frequently Asked Questions
How many hectares is 1 acre?
1 acre equals approximately 0.4047 hectares. The exact conversion: 1 acre = 4,046.856 m², and 1 hectare = 10,000 m², so 1 acre = 4,046.856 ÷ 10,000 = 0.404686 ha.
How many hectares is 5 acres?
5 acres × 0.404686 = 2.023 hectares. A small farm of 5 acres is about 2 hectares — a useful reference point when comparing US and metric land descriptions.
How many hectares is 640 acres (1 square mile)?
640 acres × 0.404686 = 259.0 hectares. One square mile (1 section of US land) equals 259 hectares or 2.59 square kilometers.
Why do the US and Europe use different land area units?
The United States uses acres, inherited from British imperial measurement. Acres were standardized in 1959 but the unit predates metric adoption. Most countries outside the US and UK use hectares, the SI-aligned metric unit for agricultural land (1 ha = 10,000 m²). International agricultural reports often publish both.
What is a quarter section in hectares?
A quarter section (160 acres) = 64.75 hectares. The US public land survey divides land into 1-square-mile sections (640 acres = 259 ha), each divisible into four quarter sections. This system is used across the Midwest and Western US.
Related Converters
Related Charts
Related Guides
Need a custom value?
This chart covers common values. For any number, use the interactive converter.
Use the interactive converter →All conversion values are calculated using internationally recognized conversion factors. Results are provided for general informational purposes — verify critical values independently. Read our full disclaimer.