Convert acres to hectares

1 ac=0.4047ha

Use the converter below to change any acres value into hectares instantly — with formula, conversion table, and real-world examples.

You have

Equals

0.40469

Conversion formula

Forward

hectares = acres × 0.4047

Reverse

acres = hectares × 2.47105

Example: 10 ac × 0.4047 = 4.04686 ha.

About both units

From

Acre

The acre equals 4046.86 square metres — originally the area a team of oxen could plough in a day. It is the standard rural land unit in the US, UK and Canada. Suburban American lots are typically a quarter to half an acre. 640 acres equal one square mile.

Real-world: A US suburban lot is 0.25–0.5 acre. A standard UK rural property might be 5 acres. A football pitch is about 1.8 acres.

Read full acre reference →

Hectare

The hectare equals 10,000 square metres — a square 100 m on each side. It is the global standard for agricultural land, forests, vineyards and large-scale property. 1 hectare is roughly equivalent to 2.47 acres. European farms are measured in hectares.

Real-world: A rugby pitch is 1 hectare. A Bordeaux vineyard parcel is typically 5–10 ha. The Vatican City covers 44 ha.

Read full hectare reference →

Acre to Hectare conversion table

Common acres to hectares values for quick reference.

Acre (ac)	Hectare (ha)
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
5,000 ac	2,023.43 ha
10,000 ac	4,046.86 ha
50,000 ac	20,234.28 ha

Tips & common mistakes

Quick tips

1 acre = 43,560 ft² = 0.4047 ha.
640 acres = 1 square mile — a "section" in US land survey.
An acre is 43,560 ft² — a useful number for US real-estate calculations.

Avoid these

Using "acre" in modern European property — use hectares or m² instead.
Assuming an acre is a specific shape — it is only an area (any shape).
Multiplying acres by 4000 m² — correct value is 4046.86.

Frequently asked questions

How many hectares in a acre?

One acre equals 0.4047 hectares.

How do I convert acres to hectares?

Multiply the acre value by 0.4047 to get the equivalent in hectares.

What is 100 acres in hectares?

100 acres equals 40.4686 hectares.

Is a acre bigger than a hectare?

No. 1 acre equals 0.4047 hectares, so one acre is smaller.

How to convert acres to hectares without a calculator?

Multiply by 0.4 for a quick estimate; use a calculator for precise results.

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