Productive ToolboxAcre to Hectare Converter
Convert acres to hectares instantly. Free online land area converter with comprehensive reference table, precision control, and conversion history.
Acre to Hectare Converter
Enter any acre value to instantly convert it to hectares. 1 acre = 0.404686 hectares.
Settings
Hectares
Enter Acres
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Quick Presets
Common Conversions
| Acres | Hectares |
|---|---|
| 0.25 | 0.1012 |
| 0.5 | 0.2023 |
| 1 | 0.4047 |
| 2 | 0.8094 |
| 5 | 2.0234 |
| 10 | 4.0469 |
| 25 | 10.1172 |
| 50 | 20.2343 |
| 100 | 40.4686 |
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What Is an Acre to Hectare Converter?
An acre to hectare converter is a free online tool that instantly converts any land area in acres to hectares (ha). The chart on this page also lists common hectares to acres values; for any other hectare figure, multiply by 2.47105 or use the companion hectare to acre converter.
The conversion is anchored to one fixed factor: 1 acre = 0.404686 hectares, derived from the international definitions of both units (1 acre = 4,046.856 m², 1 ha = 10,000 m²). The rough shortcut — divide acres by 2.5 — is only 1.2% off, but that error accumulates on large areas: on a 500-acre farm it understates the hectare count by about 2.3 hectares. This tool applies the precise factor at up to 8 decimal places.
Built for farmers comparing international land data, real estate agents working with cross-border property listings, land surveyors preparing documentation, agricultural researchers processing datasets, and anyone who regularly moves between imperial and metric land measurements. Free, no signup required.
How Acre to Hectare Conversion Works
Conversion Formulas
Hectares = Acres × 0.404686
Acres = Hectares × 2.47105
Derived from: 1 acre = 4,046.856 m² and 1 ha = 10,000 m²
Factor: 4,046.856 ÷ 10,000 = 0.404686
- 1 acre = 0.404686 ha = 4,046.86 m² = 43,560 sq ft
- 1 hectare = 2.47105 acres = 10,000 m² = 107,639 sq ft
- 640 acres = 259 hectares = 1 square mile (1 US section)
- 100 hectares = 247.105 acres = 1 km²
- Quick mental estimate: divide acres by 2.5 for approximate hectares (1.2% low)
How to Use the Acre to Hectare Converter
Step-by-Step Guide
- 1Enter Your Acre Value: Type any number of acres into the input field. Decimals are fully supported — for example, 0.25, 1.5, or 640. The conversion result appears instantly as you type.
- 2Read the Hectare Result: The hectare equivalent appears immediately. For a 1 acre input, the result is 0.404686 hectares. The result updates with every keystroke.
- 3Adjust Decimal Precision: Use the precision selector to choose 2, 4, 6, or 8 decimal places. 4 decimal places is suitable for most practical applications; 6+ for scientific or legal precision.
- 4Use Presets for Common Values: Click a preset button (1, 5, 10, 50 or 100 acres) to load a standard value instantly. Ideal for quickly checking residential lot or farm field sizes.
- 5Pick a Row from the Table: Click any row in the Common Conversions table (0.25 to 100 acres) to load it into the converter. To go the other way, use the hectare to acre converter or the formula acres = hectares × 2.47105.
- 6Copy or Export: Click the copy button to copy the result to clipboard, or download a text report of your conversion history for documentation or client handoff.
What This Tool Provides
- ✓Instant acres to hectares conversion
- ✓Hectares-to-acres reference table on the page
- ✓2, 4, 6, and 8 decimal precision
- ✓Presets: 1, 5, 10, 50, 100 acres
- ✓Clickable chart from 1 to 10,000 acres
- ✓Shareable links to any value, e.g. ?acres=160
- ✓Land size context descriptions
- ✓Conversion history (last 10 entries)
- ✓Copy result to clipboard
- ✓Export conversion report
- ✓Private: your inputs are not collected or stored
- ✓No registration required
Worked Examples
Selling US Land to European Buyers
A US ranch broker is marketing a 320-acre Montana property to European investors who think in hectares. 320 × 0.404686 = 129.5 hectares. The listing description reads: '320 acres (129.5 ha)'. European buyers immediately understand the scale — 129.5 hectares is larger than most European farms, making the size immediately legible without mental conversion. The broker uses this converter for every listing marketed internationally.
UK Property Purchase Comparison
A buyer in England is comparing three rural properties: 45 acres, 62 acres, and 38 acres. They want to understand the sizes in hectares for comparison with European farms they already own in France (recorded in hectares). 45 ac = 18.21 ha; 62 ac = 25.09 ha; 38 ac = 15.38 ha. Their French farm is 22 hectares — the 62-acre property is the closest in size and is the one they shortlist.
Agricultural Yield Normalization
A commodity analyst is comparing soybean yields from US farms (reported in bushels per acre) with Brazilian farms (reported in tonnes per hectare). Before yield comparison is possible, all areas must be in the same unit. A US farm report covering 2,400 acres: 2,400 × 0.404686 = 971.25 hectares. The yield comparison now uses hectares as the standard denominator across both datasets.
Acres to Hectares Chart
Click any acre value to load it into the converter. 100 hectares = 1 km².
| Acres | Hectares | km² |
|---|---|---|
| 1 | 0.405 | 0.004 |
| 2 | 0.809 | 0.0081 |
| 3 | 1.214 | 0.0121 |
| 4 | 1.619 | 0.0162 |
| 5 | 2.023 | 0.0202 |
| 6 | 2.428 | 0.0243 |
| 7 | 2.833 | 0.0283 |
| 8 | 3.237 | 0.0324 |
| 9 | 3.642 | 0.0364 |
| 10 | 4.047 | 0.0405 |
| 11 | 4.452 | 0.0445 |
| 12 | 4.856 | 0.0486 |
| 13 | 5.261 | 0.0526 |
| 14 | 5.666 | 0.0567 |
| 15 | 6.07 | 0.0607 |
| Acres | Hectares | km² |
|---|---|---|
| 16 | 6.475 | 0.0647 |
| 17 | 6.88 | 0.0688 |
| 18 | 7.284 | 0.0728 |
| 19 | 7.689 | 0.0769 |
| 20 | 8.094 | 0.0809 |
| 25 | 10.117 | 0.1012 |
| 30 | 12.141 | 0.1214 |
| 40 | 16.187 | 0.1619 |
| 50 | 20.234 | 0.2023 |
| 60 | 24.281 | 0.2428 |
| 75 | 30.351 | 0.3035 |
| 80 | 32.375 | 0.3237 |
| 100 | 40.469 | 0.4047 |
| 120 | 48.562 | 0.4856 |
| 150 | 60.703 | 0.607 |
| Acres | Hectares | km² |
|---|---|---|
| 160 | 64.75 | 0.6475 |
| 200 | 80.937 | 0.8094 |
| 250 | 101.171 | 1.0117 |
| 300 | 121.406 | 1.2141 |
| 320 | 129.499 | 1.295 |
| 400 | 161.874 | 1.6187 |
| 500 | 202.343 | 2.0234 |
| 640 | 258.999 | 2.59 |
| 800 | 323.749 | 3.2375 |
| 1,000 | 404.686 | 4.0469 |
| 1,500 | 607.028 | 6.0703 |
| 2,000 | 809.371 | 8.0937 |
| 2,500 | 1,011.714 | 10.1171 |
| 5,000 | 2,023.428 | 20.2343 |
| 10,000 | 4,046.856 | 40.4686 |
Hectares to acres
| Hectares | Acres |
|---|---|
| 0.5 | 1.236 |
| 1 | 2.471 |
| 2 | 4.942 |
| 3 | 7.413 |
| 4 | 9.884 |
| 5 | 12.355 |
| 10 | 24.711 |
| 20 | 49.421 |
| 25 | 61.776 |
| 50 | 123.553 |
| 100 | 247.105 |
| 200 | 494.211 |
| 500 | 1,235.527 |
| 1,000 | 2,471.054 |
Benchmarks
- 160 acres (64.75 ha) — a quarter section in the US Public Land Survey System.
- 640 acres (259 ha) — one section, exactly 1 square mile.
- 463 acres (187.4 ha) — average US farm (USDA Census of Agriculture, 2022).
- 17.4 ha (43 acres) — average EU farm (Eurostat farm structure survey, 2020).
Exact factor: 1 acre = 0.40468564224 ha. For hectares to acres with your own value, use the hectare to acre converter.
Frequently Asked Questions
How many hectares is 1 acre?
1 acre equals 0.404686 hectares. This is derived from the exact definitions: 1 acre = 4,046.856 square meters and 1 hectare = 10,000 square meters. Dividing: 4,046.856 ÷ 10,000 = 0.404686.
How many acres is 1 hectare?
1 hectare equals 2.47105 acres. This is the reciprocal of the acre-to-hectare factor: 1 ÷ 0.404686 = 2.47105. So 5 hectares equals 12.3553 acres.
Which is bigger — an acre or a hectare?
A hectare is larger. 1 hectare = 2.47105 acres, so a hectare is about 2.47 times the size of an acre. An acre is 4,046.86 square meters; a hectare is 10,000 square meters.
How many hectares is 0.5 acres?
0.5 acres equals 0.202343 hectares. Calculation: 0.5 × 0.404686 = 0.202343. A half-acre lot is approximately 0.20 hectares.
How many hectares is 2.5 acres?
2.5 acres equals 1.01172 hectares. Calculation: 2.5 × 0.404686 = 1.01172.
How many hectares is 10 acres?
10 acres equals 4.04686 hectares. Calculation: 10 × 0.404686 = 4.04686.
How many hectares is 100 acres?
100 acres equals 40.4686 hectares. Calculation: 100 × 0.404686 = 40.4686.
How many hectares is 640 acres (1 square mile)?
640 acres equals 258.999 hectares — approximately 259 hectares. One US section (1 square mile) of land is 640 acres or about 259 hectares.
What is the acre to hectare formula?
Hectares = Acres × 0.404686. For reverse conversion: Acres = Hectares × 2.47105. Both conversion factors are internationally standardized and used in all official land measurement systems.
Where are acres used vs hectares?
Acres are primarily used in the United States, United Kingdom, Canada, and a few other countries for real estate and agriculture. Hectares are the standard metric unit used across most of Europe, Asia, Africa, and South America, and in all international agricultural and environmental data.
Is my data private when using this converter?
Yes. We do not collect or store what you enter.
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