Acres ↔ Hectares Converter

Convert between acres and hectares instantly

Acres (ac)

Enter acres value to convert to hectares

Hectares (ha)

Enter hectares value to convert to acres

Conversion Result

10 acres = 4.0469 hectares

10 acres ≈ 4.05 ha • 40468.6 m² • 0.0405 km²

📚 Acres ↔ Hectares Conversion Details

Acres to Hectares Formula

hectares = acres × 0.404686

To convert acres to hectares, multiply the acres by 0.404686.

Hectares to Acres Formula

acres = hectares × 2.47105

To convert hectares to acres, multiply the hectares by 2.47105.

Bidirectional Conversion

This converter works both ways simultaneously:

Type in acres → hectares updates automatically
Type in hectares → acres updates automatically
No buttons to click - works as you type

Common Uses

Land measurement and surveying
Agricultural land calculation
Real estate and property
Farmland and forestry

🌍 Understanding Acres and Hectares

1 Acre ≈ 0.4047 hectares

1 Hectare ≈ 2.4711 acres

1 Acre in m² ≈ 4,046.86 square meters

1 Hectare in m² ≈ 10,000 square meters

📏 How This Converter Works

This is a bidirectional converter that works in real-time:

Acres → Hectares: When you type in the acres field, the hectares field automatically updates
Hectares → Acres: When you type in the hectares field, the acres field automatically updates
No swapping needed: Both conversions happen simultaneously
Real-time: Updates happen as you type, no button clicks required

// Bidirectional Conversion Logic:
hectares = acres × 0.404686
acres = hectares × 2.47105

// Example 1: Type "10" in acres
hectares = 10 × 0.404686 = 4.04686

// Example 2: Type "5" in hectares
acres = 5 × 2.47105 = 12.3553

📊 Conversion Table

Acres	Hectares	Square Meters
1 ac	0.4047 ha	4,047 m²
5 ac	2.0234 ha	20,234 m²
10 ac	4.0469 ha	40,469 m²
25 ac	10.1172 ha	101,172 m²
50 ac	20.2343 ha	202,343 m²
100 ac	40.4686 ha	404,686 m²

❓ Frequently Asked Questions

Q: How many hectares are in one acre?

A: One acre is equal to approximately 0.404686 hectares.

Q: How does the bidirectional conversion work?

A: Both input fields work simultaneously. When you change the acres value, hectares updates automatically. When you change the hectares value, acres updates automatically.

Q: Which countries use acres vs hectares?

A: Acres are primarily used in the United States and some Commonwealth countries. Hectares are used in most other countries and are the standard SI unit.

Q: How accurate is this converter?

A: This converter provides calculations with 5 decimal places accuracy using the exact conversion factor.

🌳 Real-World Examples

Football Field (American) ≈ 1.32 acres (0.53 ha)

Soccer Field ≈ 1.76 acres (0.71 ha)

Average US Residential Lot ≈ 0.25 acres (0.10 ha)

Central Park (NYC) ≈ 843 acres (341 ha)