Acres to Hectares Converter
Convert between various measurement units instantly.
1 ac = 0.404686 ha
Reference Table
Conversion Results
Conversion Formula
Quick Reference Table
| Acres | Hectares |
|---|---|
| 1 ac | 0.4047 ha |
| 5 ac | 2.02343 ha |
| 10 ac | 4.04686 ha |
| 50 ac | 20.2343 ha |
| 100 ac | 40.4686 ha |
| 500 ac | 202.343 ha |
| 1,000 ac | 404.686 ha |
About These Units
Acres and Hectares are linked by one constant: 0.4047. Multiply your Acres figure by it and you have the answer in Hectares — for example 10 Acres becomes 4.04686 Hectares. The calculator above handles decimals and large numbers alike; the reference table lists the values people look up most.
Acres and Hectares measure the same physical quantity but belong to different scales, so moving a figure from Acres into Hectares — or back again — is a routine step whenever specifications, prices, or measurements cross between the two systems.
About Acres
The acre (ac) is 4,047 m² (43,560 sq ft) — historically the area one ox could plow in a day.
An ancient unit codified in English statute law; varied regionally before standardization.
About Hectares
The hectare (ha) is 10,000 m² — a square 100m × 100m, approximately 2.47 acres.
Introduced in the 1795 French metric reforms specifically for agricultural land measurement.
When Conversion Is Needed
Acres and Hectares belong to different measurement systems, so conversion becomes necessary when comparing values across the two units, or when forwarding a document or specification written in one unit to someone who uses the other. The quick-reference table on this page shows how common values in Acres translate to Hectares, so memorizing or bookmarking the most frequently-used values is often a worthwhile shortcut.
Real-World Examples
Here is how familiar values in Acres translate into Hectares.
- an American football field1 ac = 0.4047 ha
- a small farm100 ac = 40.4686 ha
- Central Park843 ac = 341.15 ha
Real-World Use Cases
Understanding where Acres and Hectares each show up in daily life makes the conversion between them far more intuitive.
Where Acres is used
Used for US/UK real estate, farmland sales, ranch sizes, and golf course measurements.
Where Hectares is used
Used as the standard agricultural unit in most of the world for crop yields, farms, and parks.
Related Converters
Frequently Asked Questions
How is Acres converted to Hectares?
Each Acres is multiplied by the factor 0.4047. So 10 Acres equals 4.04686 Hectares. Enter a value above to see it applied instantly.
Acres to Hectares: what is the ratio?
The ratio is 0.4047 — one Acres makes 0.4047 Hectares, and conversely one Hectares makes 2.47105 Acres.
Are the Acres-to-Hectares figures precise?
Yes. Calculations use full floating-point precision and the officially recognized constant, with rounding applied only when the number is shown on screen.
Detailed Guide to Acres to Hectares Converter
Convert between various measurement units instantly.
Key Benefits
- ✓Instant Acres-to-Hectares conversion as you type — no button to press
- ✓Exact factor built in: 1 Acres = 0.4047 Hectares (and 1 Hectares = 2.47105 Acres)
- ✓Bi-directional: swap Acres and Hectares in one click
- ✓Quick-reference table for common Acres values
- ✓100% free, runs in your browser — no signup, no limits
Frequently Asked Questions
How many Hectares are in one Acres?
One Acres equals 0.4047 Hectares. To go the other way, one Hectares is 2.47105 Acres. The calculator applies this factor automatically for any value you enter.
Is this Acres-to-Hectares converter accurate?
Yes. It uses IEEE 754 double-precision math with internationally accepted constants, so results are exact to display precision — no rounding surprises.
Disclaimer: This tool is provided for informational purposes only.
"Our tools are 100% free and run entirely in your browser. Your data never leaves your device."
Area Converters
View all →- Square Meters to Square Kilometers
- Square Meters to Square Miles
- Square Meters to Acres
- Square Meters to Hectares
- Square Kilometers to Square Meters
- Square Kilometers to Square Miles
- Square Kilometers to Acres
- Square Kilometers to Hectares
- Square Miles to Square Meters
- Square Miles to Square Kilometers
- Square Miles to Acres
- Square Miles to Hectares
- Acres to Square Meters
- Acres to Square Kilometers
- Acres to Square Miles
- Hectares to Square Meters
- Hectares to Square Kilometers
- Hectares to Square Miles
- Hectares to Acres
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