Acres to hectares converter for instant land area results (ac → ha).
1 acre = 0.404685642 hectares — accurate, mobile-friendly, and free.
How to Convert Acres to Hectares (Step-by-Step)
Converting acres to hectares is simple when you know the exact conversion factor.
Use the following formula to get precise land measurements for agriculture, real estate, or planning.
📐 Formula: hectares = acres × 0.404685642 (≈ 0.4047)
💡 Example: 2 acres × 0.404685642 = 0.8094 hectares
🔁 Reverse Tip: To convert hectares back to acres → multiply by
2.47105381 (≈ 2.4711)
“1 Acre to Hectare” (Explained)
When converting land area, remember that 1 acre is equal to exactly
0.404685642 hectares — often rounded to
0.4047 ha for simplicity.
🔹 Rounded value: 1 acre = 0.4047 ha — perfect for general estimates and quick planning.
🔹 Exact value: 1 acre = 0.404685642 ha — required in legal land records, surveying, or agricultural mapping.
Always choose between rounded or exact conversion depending on your purpose —
for instance, use full precision in deeds and contracts, but rounded figures for estimates or designs.
Step-by-Step Examples (Small → Large)
Here’s how the acres to hectares formula works in practice — starting from small to large plots.
Results are shown up to 4–5 decimal places for accuracy:
| Acres | × 0.404685642 | Result (Hectares) |
|---|---|---|
| 0.25 | × 0.404685642 | 0.1012 ha |
| 0.5 | × 0.404685642 | 0.2023 ha |
| 1 | × 0.404685642 | 0.4047 ha |
| 5 | × 0.404685642 | 2.0234 ha |
| 10 | × 0.404685642 | 4.0469 ha |
💡 Note: Use 4-decimal rounding for everyday conversions and full precision for legal or survey records.
🔢 Acres to Hectares Conversion Chart (Most Searched)
Quickly find how many hectares are in your acres — using the conversion
1 acre = 0.404685642 ha. These are the most searched acre-to-hectare conversions online:
| Acres | Hectares | Rounded (ha) |
|---|---|---|
| 2 | 0.809371 | 0.81 |
| 2.5 | 1.011714 | 1.01 |
| 5 | 2.023428 | 2.02 |
| 10 | 4.046856 | 4.05 |
| 12 | 4.856227 | 4.86 |
| 20 | 8.093713 | 8.09 |
| 23 | 9.307770 | 9.31 |
| 30 | 12.140569 | 12.14 |
| 50 | 20.234282 | 20.23 |
| 80 | 32.374852 | 32.37 |
| 100 | 40.468564 | 40.47 |
| 120 | 48.562277 | 48.56 |
| 160 | 64.749703 | 64.75 |
| 200 | 80.937127 | 80.94 |
| 300 | 121.405691 | 121.41 |
| 500 | 202.342819 | 202.34 |
| 1000 | 404.685642 | 404.69 |
| 2000 | 809.371284 | 809.37 |
| 3000 | 1214.056926 | 1214.06 |
💡 Use these conversions to quickly estimate farm size, plot area, or land valuation when switching between
acres and hectares.
Reverse Chart – Hectares to Acres
Use this reverse table to quickly convert hectares to acres — especially useful when reviewing
agricultural land records or planning property layouts.
The formula is: acres = hectares × 2.47105381.
| Hectares (ha) | × 2.47105381 | Result (Acres) |
|---|---|---|
| 0.1 | × 2.47105381 | 0.2471 ac |
| 0.2 | × 2.47105381 | 0.4942 ac |
| 0.25 | × 2.47105381 | 0.6178 ac |
| 0.5 | × 2.47105381 | 1.2355 ac |
| 1 | × 2.47105381 | 2.4711 ac |
| 2 | × 2.47105381 | 4.9421 ac |
| 5 | × 2.47105381 | 12.3553 ac |
| 10 | × 2.47105381 | 24.7105 ac |
| 20 | × 2.47105381 | 49.4211 ac |
💡 Tip: 1 hectare ≈ 2.47 acres — a quick mental shortcut for most real-world conversions.
Real-World Land Examples
The table below helps visualize how acres and hectares relate to actual land sizes measured in meters.
This is particularly useful in real estate, farming, and urban planning.
| Dimensions (m) | Area (ha) | Equivalent (acres) |
|---|---|---|
| 100 m × 100 m | 1 ha | 2.4711 ac |
| 150 m × 300 m | 4.5 ha | 11.120 ac |
| 200 m × 200 m | 4 ha | 9.8844 ac |
💡 Golden fact: One hectare equals a perfect square of 100 m × 100 m — the standard base unit in metric land measurement.
Convert Acres to Hectares in Excel or Google Sheets
If you manage land data or real estate plots in Excel or Google Sheets, you can automate the acres-to-hectares conversion easily using formulas.
Here’s how to do it in just one step:
👉 Acres → Hectares:
=A1*0.404685642
👉 Hectares → Acres:
=A1*2.47105381
💡 Tip: Use rounding for cleaner results →
=ROUND(A1*0.404685642,4)
📊 This is perfect for surveyors, architects, and analysts who work with large datasets —
ensuring consistent, accurate conversions without manual calculation errors.
Acres to — Most Common Conversions
| Conversion | Formula | Example |
|---|---|---|
| Acres to Square Feet | ft² = acres × 43,560 | 1 acre = 43,560 ft² |
| Acres to Square Meters | m² = acres × 4,046.86 | 1 acre = 4,046.86 m² |
| Acres to Square Yards | yd² = acres × 4,840 | 1 acre = 4,840 yd² |
| Acres to Hectares | ha = acres × 0.4047 | 10 acres = 4.047 ha |
| Acres to Square Miles | mi² = acres ÷ 640 | 640 acres = 1 mi² |
💡 For more area conversion tools, visit our
main calculator index — covering square meters, feet, yards, hectares, and more.
FAQs – Acres to Hectares
1. How do you convert acres to hectares?
Multiply acres by 0.404685642 (≈ 0.4047).
2. How many hectares in 1 acre?
1 acre = 0.404685642 ha.
3. How many acres in 1 hectare?
1 hectare = 2.47105381 acres.
4. Is 1 acre equal to 1 killa?
In many parts of India and Pakistan, “killa” is a traditional equivalent to an acre, but exact definitions can vary by region. Always check local records for accuracy.
5. What dimensions make 1 hectare?
A perfect square of 100m × 100m.
6. Can I round results?
Yes — rounding to 4 decimals is fine for general use, but not for legal or engineering documents.
7. Is the converter free?
Yes, it’s 100% free to use on PixelsCalculator.
Conclusion & External Reference
Converting acres to hectares makes land evaluation and agricultural planning easier and more consistent across measurement systems.
Remember: 1 acre = 0.4047 hectares — use our free calculator for instant, accurate results.
🔗 Learn more from trusted resources:
Wikipedia – Acre |
Wikipedia – Hectare