Updated · Built and checked by the PlinzoTools team, formulas tested against published sources
Convert Acres to Hectares instantly with an exact, accurate formula -- no sign-up, no ads blocking the result.
Converting Acres to Hectares means multiplying by an exact, fixed constant (0.40468564) rather than an approximation -- the same factor this calculator uses internally. Area conversions matter for real estate, land measurement, flooring, and international property comparisons, since acres and square feet dominate US real estate while square meters and hectares are the metric standard used through most of the rest of the world. One hectare equals exactly 10,000 square meters, or about 2.47105 acres. One acre equals exactly 43,560 square feet, historically the area one ox could plow in a day.
Enter your value and confirm the "From Unit" dropdown is set to Acres -- the result grid updates instantly, showing your value converted into every unit in this area category at once (not just Hectares), so you can see multiple equivalent measurements without switching tools. There's no button to press and nothing is sent to a server, so it works the same on a phone with no signal as it does on a desktop.
Hectares = Acres × 0.40468564
Area units are always the square of a length unit (a square meter is a 1m × 1m square), so every area conversion factor is mathematically the underlying length factor squared -- for example, since 1 foot = 0.3048 meters exactly, 1 square foot = 0.3048² = 0.09290304 square meters exactly.
| Acres | Hectares |
|---|---|
| 1 | 0.40468564 |
| 5 | 2.02342821 |
| 10 | 4.04685642 |
| 50 | 20.23428211 |
| 100 | 40.46856422 |
Comparing property or land listings that mix acres and square meters/hectares. Flooring, landscaping, and construction projects that need an exact area conversion. Agricultural land measurement across US and international unit conventions. For related conversions, see Acres to Square Feet Converter and Square Footage Calculator.
This calculator carries full precision internally and only rounds the final displayed result for readability -- if you need more or fewer decimal places than shown, the underlying value is still exact to the limits of floating-point arithmetic.
Multiply the Acres value by 0.40468564 to get Hectares. This calculator does that automatically as you type, so you don't need to do the multiplication by hand.
Yes -- 1 Acres equals 0.40468564 Hectares by definition, so the result is mathematically exact rather than a rounded estimate (the displayed value may be rounded for readability, but the underlying calculation isn't).
Yes -- change the "From Unit" dropdown above the input to switch direction. The same conversion engine handles every unit in this category, not just Acres and Hectares.
Because area is inherently two-dimensional -- converting Acres to Hectares scales both the length and width of the same region, so the linear conversion factor gets applied twice (squared), not just once as it would for a simple length conversion.
Hectares is one of the standard units for measuring area -- see the Practical Uses section above for the specific contexts where it's most commonly encountered.
100 acres equals 40.468564 hectares, using the same 0.40468564 factor as the rest of this page.
Multiplying a acres value by 0.4046856 gives you hectares. The reverse conversion divides by 0.4046856, which is the same as multiplying by 2.471054. For example, 12.5 acres × 0.4046856 = 5.058571 hectares, and 60 acres × 0.4046856 = 24.28114 hectares.
One acre equals exactly 43,560 square feet, historically the area one ox could plow in a day. One hectare equals exactly 10,000 square meters, or about 2.47105 acres.
| Acres | Hectares |
|---|---|
| 1 | 0.4046856 |
| 2 | 0.8093713 |
| 3 | 1.214057 |
| 5 | 2.023428 |
| 10 | 4.046856 |
| 15 | 6.070285 |
| 20 | 8.093713 |
| 25 | 10.11714 |
| 50 | 20.23428 |
| 75 | 30.35142 |
| 100 | 40.46856 |
| 250 | 101.1714 |
| 500 | 202.3428 |
| 1,000 | 404.6856 |
How many hectares are in 1 acres?
1 acres equals 0.4046856 hectares.
How many acres are in 1 hectares?
1 hectares equals 2.471054 acres.
What is 3.5 acres in hectares?
3.5 acres equals 1.4164 hectares, using the same 0.4046856 factor as the rest of this chart.
Is this conversion exact or approximate?
The 0.4046856 factor comes from a fixed, exact definitional constant, so the underlying math is exact; the numbers on this page are rounded to seven significant digits for readability, and the calculator above keeps the full-precision value.
Values are rounded to seven significant digits for display; the converter above uses the full-precision factor.
Reference: NIST Weights and Measures