Ares to Hectares Calculator — a to ha Conversion
Convert any number of ares to hectares (ha), square meters, square feet and acres. The are is a metric unit of area equal to exactly 100 m²; 100 ares = 1 hectare.
a
1 are = 0.01 ha (exact) — 100 ares = 1 hectare
The are is defined as exactly 100 m²
1 hectare = 10 000 m², so divide to get the ratio
Multiply your are value by 0.01
- 1
Conversion factor
1 a = 100 m² ÷ 10 000 m²/ha = 0.01Both units are metric — the factor 0.01 is exact. - 2
Hectares
10 × 0.01 = 0.1000
How does this calculator work?
Hectares = ares × 0.01. The factor comes from: 1 are = 100 m² (defined), and 1 hectare = 10 000 m², so 100 ÷ 10 000 = 0.01 ha per are. Equivalently, 100 ares = 1 hectare. The conversion is exact — no approximation needed.
Formula
How this is calculated
The are (symbol: a) is a metric unit of area defined in 1793 as exactly 100 square metres — the area of a 10 m × 10 m square. It was the original SI base unit for land area before the hectare became standard. The hectare (symbol: ha) is defined as exactly 100 ares, or 10 000 m², which equals a 100 m × 100 m square.
The conversion is therefore exact: dividing the number of ares by 100, or equivalently multiplying by 0.01, gives hectares. Conversely, multiplying hectares by 100 gives ares. Because both units are purely metric, no approximation is involved — the factor is a defined constant.
While the are itself is rarely used in everyday conversation — the hectare has largely taken over for agricultural and planning purposes — the decare (10 ares = 0.1 ha) remains common in some Eastern European and former Soviet countries for farm parcels. The square meter is the SI base unit for precise engineering contexts, and acres and square feet bridge to the imperial system for US and UK comparisons.
Frequently asked questions
There are exactly 100 ares in one hectare. Both units are metric: 1 are = 100 m², and 1 hectare = 10 000 m², so 10 000 ÷ 100 = 100 ares per hectare.
An are (a) equals 100 m² (10 m × 10 m). A hectare (ha) equals 10 000 m² (100 m × 100 m). So a hectare is exactly 100 times larger than an are. The are is rarely used today, but the hectare is the standard metric unit for agricultural land.
One are equals approximately 0.024711 acres. Conversely, one acre equals roughly 40.469 ares.
Also known as
TG we-Calculate Editorial Team. (2026). Ares to Hectares Calculator — a to ha Conversion [Online calculator]. TG we-Calculate. https://we-calculate.com/calculator/ares-to-hectares-calculator
TG we-Calculate Editorial Team. "Ares to Hectares Calculator — a to ha Conversion." TG we-Calculate. 2026. https://we-calculate.com/calculator/ares-to-hectares-calculator.
TG we-Calculate Editorial Team, "Ares to Hectares Calculator — a to ha Conversion," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/calculator/ares-to-hectares-calculator
@misc{wecalculate_ares_to_hectares_calculator, title = {Ares to Hectares Calculator — a to ha Conversion}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/calculator/ares-to-hectares-calculator}}, year = {2026}, note = {TG we-Calculate} }
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