# Ares to Hectares Converter

URL: https://speedycalculator.com/calculators/conversion/ares-to-hectares/
Last updated: 2026-10-25

> Convert ares (a) to hectares (ha): 1 are = 0.01 ha, so multiply by 0.01 or divide by 100. Both fields are editable, so you can also type in hectares and get ares back.

## Inputs

- Ares (a)

## Results

- Hectares

## Formula

```
1 a = 0.01 ha
1 ha = 100 a
ha = a × 0.01
```

## Explanation

A hectare is 100 ares: the name literally means “hundred ares”. Divide ares by 100 to get hectares.

### How to use the Ares to Hectares Converter

- Type the number of ares into the **Ares** field. Decimals such as 50 are fine.
- Read the answer in **Hectares** – it updates as you type, with no button to press.
- To convert the other way, type into **Hectares** and the ares are recalculated.
- Press **Copy results** to copy both values with the page title, or **Copy link** to share this exact conversion.

This page converts only a ⇄ ha. Need a different unit? Use the general area converter, where you can choose any “from” and “to” unit.

### How it works

Both units measure area, so they are always in the same ratio: one are equals 0.01 hectares. The calculator multiplies the number of ares you type by 0.01 to give hectares, and when you type into the hectares field it divides by the same factor to give ares. Because the ratio never changes, doubling the ares always doubles the hectares. Results are calculated at full precision and rounded only for display (up to eight decimal places, with very large or small values shown in scientific notation).

### How to convert ares to hectares

- Write down the value in ares, for example **100 a**.
- Multiply by the conversion factor 0.01 (because 1 are = 0.01 ha).
- 100 × 0.01 = **1 ha**.
- To go back from hectares to ares, divide by 0.01 – or multiply by 100.

### a to ha conversion table

AresHectaresHectaresAres1 a0.01 ha1 ha100 a5 a0.05 ha2 ha200 a10 a0.1 ha5 ha500 a25 a0.25 ha10 ha1,000 a50 a0.5 ha20 ha2,000 a100 a1 ha50 ha5,000 a250 a2.5 ha100 ha10,000 a500 a5 ha1,000 ha100,000 a1,000 a10 ha

### What is an are?

An are is 100 m², a square 10 m on each side. It is the base of the hectare (100 ares) and is still used for small plots in parts of Europe and South Asia.

### What is a hectare?

A hectare is 10,000 m², a square 100 m on each side. Farmland and forests are measured in hectares in most countries; one hectare is about 2.471 acres.

### Common mistakes to avoid

Converting area with a length factor (1 m = 3.28 ft, but 1 m² = 10.76 ft², not 3.28 ft²), and assuming regional land units such as marla, bigha or katha have one standard size everywhere.

## Worked example

Inputs — Ares: 100 a.

Results — **Hectares = 1 ha**.

## FAQ

**How many ares in a hectare?**
100.

**How many m² in an are?**
100 m².

**How do I convert ares to hectares?**
Multiply the number of ares by 0.01. For example, 100 a × 0.01 = 1 ha.

**How do I convert hectares back to ares?**
Divide by 0.01 (or multiply by 100), or simply type the value into the hectares field above.

**What is 10 a in hectares?**
10 a = 0.1 ha.

**What is 5 a in hectares?**
5 a = 0.05 ha.

**Is this conversion exact?**
Yes. The factor comes from the official definitions of both units (NIST and the SI), so the only difference you may see is rounding in the last displayed digit.

**Can I convert to other units on this page?**
This page converts only between ares and hectares. To pick any area unit, use the general area converter linked under Related calculators.

**What formula does the Ares to Hectares Converter use?**
1 a = 0.01 ha.


## Sources

- [NIST Special Publication 811 – Guide for the Use of the International System of Units](https://www.nist.gov/pml/special-publication-811)
- [NIST Handbook 44 Appendix C – General tables of units of measurement](https://www.nist.gov/pml/owm/nist-handbook-44-current-edition)