Area Converter

Convert Acre to Hectare.

Input the value of acres below to convert instantly to hectares with standard conversions, definitions, and equations.

Area Converter

Value in Hectares = Value in Acres × 0.404686 Multiply the value in acres by the conversion factor 0.404686.

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Overview

About converting acres to hectares

Acres to hectares is the land-measurement conversion used in farming, forestry, and rural real estate to move between imperial and metric area.

One acre is about 0.404686 hectares, so converting acres to hectares means multiplying by roughly 0.405. So 10 acres is 4.05 hectares, and 100 acres is 40.5 hectares.

An acre was historically the area a yoke of oxen could plow in a day — 43,560 square feet, or one furlong by one chain. A hectare is cleaner: exactly 10,000 square meters, a square 100 m on each side. The mismatch between a custom-derived unit and a metric one is why the conversion factor is an awkward 0.405.

Practical Tips

Quick estimate: multiply acres by 0.4.
Reverse anchor: 1 hectare ≈ 2.47 acres.

How to Convert Acres to Hectares

To convert acre to hectare, we use the official conversion formulas. Below is the mathematical formula, plain-English explanation, and a worked example.

acre-to-hectare-formula.py

# Mathematical Formula

Value in Hectares = Value in Acres × 0.404686

# Worked Example (5 ac)

5 ac × 0.404686 = 2.0234 ha

What is a Acre?

Acre (ac)

A unit of land area equal to 43,560 square feet or approximately 4,047 square meters.

What is a Hectare?

Hectare (ha)

A non-SI metric unit of area equal to a square with 100-meter sides (10,000 square meters).

Acre to Hectare Conversion Table

Acre (ac)	Hectare (ha)
1 ac	0.40469 ha
2 ac	0.80937 ha
3 ac	1.21406 ha
5 ac	2.02343 ha
10 ac	4.04686 ha
15 ac	6.07028 ha
20 ac	8.09371 ha
25 ac	10.11714 ha
50 ac	20.23428 ha
100 ac	40.46856 ha
250 ac	101.17141 ha
500 ac	202.34282 ha
1000 ac	404.68564 ha

Hectare to Acre Conversion Table

Hectare (ha)	Acre (ac)
1 ha	2.47105 ac
2 ha	4.94211 ac
3 ha	7.41316 ac
5 ha	12.35527 ac
10 ha	24.71054 ac
15 ha	37.06581 ac
20 ha	49.42108 ac
25 ha	61.77635 ac
50 ha	123.55269 ac
100 ha	247.10538 ac
250 ha	617.76345 ac
500 ha	1235.52691 ac
1000 ha	2471.05381 ac

Questions

Frequently Asked Questions

How do I convert acres to hectares?

Multiply the value in acres by the conversion factor 0.404686. For example, to convert 5 acres to hectares: 5 × 0.404686 = 2.0234 ha.

What is the conversion factor from acre to hectare?

The conversion factor is 0.404686. One acre is equal to 0.404686 hectares.

What is the reverse conversion from hectare to acre?

To convert hectares back to acres, multiply by 2.471054 (or divide the value by 0.404686). One hectare is equal to 2.471054 acres.

How many square feet are in an acre?

There are exactly 43,560 square feet in one acre.

What is the difference between an acre and a hectare?

A hectare is a metric unit of area equal to 10,000 square meters, while an acre is an imperial unit equal to approximately 4,047 square meters. Thus, 1 hectare is about 2.47 acres.

Related Area Conversions

Acre to Square Millimeter Acre to Square Centimeter Acre to Square Meter Acre to Square Kilometer Acre to Square Inch Acre to Square Foot Acre to Square Yard Acre to Square Mile