Area converter
Acre to Hectare Converter
Convert ac to ha or reverse with one click. Type a value below for an instant result.
Acre ac
Hectare ha
ac → ha · runs in your browser, no server
How to convert acre to hectare
Acre (ac) and Hectare (ha) both measure area. Whether you are studying, traveling, cooking, or working on a project, converting between them should be fast and accurate.
Looking for the opposite direction? See our dedicated hectare to acre converter — same formula reversed, with content written for that direction.
The standard relationship used on this page means that 1 acre equals 0.404686 ha. Enter any number in the calculator — use the swap button to reverse the direction without leaving the page.
Converting 1 ac gives 0.404686 ha. This is a practical reference when switching between acre and hectare for real estate listings, land surveys, agriculture, and floor plans.
Need hectare to acre instead? Try our Hectare to Acre converter. hectare → acre
When you'll use this
- Converting a US farmland listing's acreage into hectares for an international buyer or agricultural report
- Comparing US crop yield (bushels per acre) to international yield figures reported per hectare
- Converting a US ranch or rural property's acre size into hectares for a foreign investor
- Converting a US forestry or conservation area's acreage into hectares for an international environmental report
- Comparing a US vineyard's acreage to European vineyards, which are almost always described in hectares
Practical note
International agriculture and land investment are the main drivers of this conversion: a 500-acre US farm converts to about 202 hectares, a figure that lets a European or international buyer immediately compare the property's scale to farmland priced and marketed in hectares back home. Wine industry comparisons are a fun specific case — a Napa Valley vineyard listed at "40 acres" converts to about 16.2 hectares, letting a wine buyer compare it directly to the hectare-denominated size of a French or Italian vineyard, since European wine regions almost universally describe vineyard size in hectares rather than acres.
Tips
- 1 acre is about 0.405 hectares, so dividing acres by roughly 2.47 gives a quick hectare estimate before checking the exact figure.
- Agricultural yield comparisons need this conversion applied carefully — "bushels per acre" and "tonnes per hectare" are not just different units but sometimes different crop-weight conventions too, so compare total yield, not just the area unit.
- US farms are often described in the thousands of acres; a 1,000-acre farm converts to about 405 hectares, a scale reference worth keeping in mind when reading international agricultural news.
Read our full guide: Area measurements guide
ac to ha conversion table
| ac | ha |
|---|---|
| 1 | 0.404686 |
| 5 | 2.02343 |
| 10 | 4.04686 |
| 25 | 10.11715 |
| 50 | 20.2343 |
| 100 | 40.4686 |
| 500 | 202.343 |
ha to ac conversion table
Or click the swap button in the converter to switch from ha to ac.
| ha | ac |
|---|---|
| 1 | 2.471051 |
| 5 | 12.355258 |
| 10 | 24.710516 |
| 25 | 61.776290 |
| 50 | 123.552581 |
| 100 | 247.105163 |
| 1000 | 2471.05163 |
Frequently asked questions
How many hectares are in 1 acre? +
One acre equals 0.404686 ha. Use the converter above for any value — results are calculated locally with full precision.
How do I convert ac to ha? +
Use the formula: ha = ac × 0.404686. Enter your value in the calculator and the result appears instantly. Click the swap button to convert ha back to ac.
How many acres are in 1 hectare? +
One hectare equals 2.471051 ac. Swap the converter direction to work backwards from ha to ac.
What is 10 ac in ha? +
10 ac is 4.04686 ha. See the conversion table on this page for more common values.
When would I convert acre to hectare? +
This conversion is useful for real estate listings, land surveys, agriculture, and floor plans. ConvertHub runs entirely in your browser — no data is uploaded to any server.
Is acre to hectare the same as hectare to acre? +
They are inverse operations. This page focuses on ac → ha with examples and tables for that direction. For ha → ac, use our separate hectare to acre converter page.