What this converter does
This converter turns acres into hectares and back instantly, alongside square metres, square feet, square kilometres and the Indian units guntha and cent. Every pair uses an exact ratio, so plot and farmland areas stay precise. Type a value and read the answer as you type.
One acre is 4,046.856 square metres and one hectare is exactly 10,000, so an acre is about 0.4047 hectare. For distances rather than areas, see the length units the site covers.
The units it covers
Every unit is a fixed area, so each converts through the square metre with a set ratio.
View all units & their values
| Unit | Symbol | Value | Mainly used |
|---|---|---|---|
| Square metre | m² | 1 | SI unit of area |
| Hectare | ha | 10,000 | Farmland, planning (metric) |
| Acre | ac | 4,046.86 | Land in US, UK, India |
| Square foot | ft² | 0.0929 | Plots, built-up area (US) |
| Square kilometre | km² | 1,000,000 | Regions, large sites |
| Guntha | guntha | 101.17 | Land in western India |
| Cent | cent | 40.4686 | Land in south India |
The formula
Each unit has a fixed value in square metres, so converting means going through the m² once:
result = value × factor_from ÷ factor_toWhere:
- value = the area you typed, in the “from” unit
- factor_from = the “from” unit’s value in square metres
- factor_to = the “to” unit’s value in square metres
Worked example
Convert 5 acres to hectares.
1 acre = 0.404686 ha5 × 0.404686 = 2.0234 haSo 5 acres is just over 2 hectares.
The units in this example
A customary unit of land area used in the US, UK and India, equal to 4,046.856 square metres or 43,560 square feet.
- 1 acre = 4,046.86 m²
- 1 acre ≈ 0.4047 hectare
- 1 acre = 43,560 ft²
- 1 acre ≈ 40.469 cent
A metric unit of area equal to 10,000 square metres (a 100 m square), used for farmland and land planning worldwide.
- 1 ha = 10,000 m²
- 1 ha ≈ 2.4711 acres
- 1 ha = 100 ares
- 1 km² = 100 hectares