GreatCalc
العربية

Area Converter

Convert between square metres, hectares, the Egyptian feddan, dunam, acres, square feet and over 140 regional units grouped by region.

Enter the values to see the result here.

Formula

Areas are stored in square metres. Because area is length squared, each factor is the square of the corresponding length factor:

xto=xfrom×ffromftox_{\text{to}} = x_{\text{from}} \times \frac{f_{\text{from}}}{f_{\text{to}}}

Factors in m²: hectare 10,000; acre 4,046.8564224; square foot 0.30482=0.092903040.3048^2 = 0.09290304; square mile 1609.3442=2,589,988.111609.344^2 = 2{,}589{,}988.11; feddan 4,200.833; dunam 1,000.

Worked example

A plot of 500 m².

  • In feddan: 500/4200.833=0.11902500 / 4200.833 = 0.11902 feddan, or about 2.86 qirat.
  • In square feet: 500/0.09290304=5,381.96500 / 0.09290304 = 5{,}381.96 ft².
  • In acres: 500/4046.856=0.1236500 / 4046.856 = 0.1236 acre.

Common mistakes

  • Using the length factor for an area. 1 ft is 0.3048 m but 1 ft² is 0.0929 m², not 0.3048.
  • Confusing the English acre with the Egyptian feddan: they differ by about 4%.
  • Treating hectares and acres as nearly equal. One hectare is 2.47 acres.
  • Converting rooms by adding the sides rather than multiplying them first.

Frequently asked questions

How big is a feddan?

The Egyptian feddan is 4,200.833 m², or 24 qirat, about 1.038 acres. Divided further, one qirat is 175.035 m² and one sahm is 7.293 m².

Is a dunam always 1,000 m²?

The metric dunam is, and the tool uses it. Older Ottoman dunams varied by region, between roughly 900 and 1,600 m², so check the local definition for old land deeds.

Why is a square foot not 144 times a square metre?

A square foot is 0.3048 m on each side, so its area is 0.3048² = 0.09290304 m². Squaring a length factor is the step people forget; areas scale with the square of the length factor.

How do I convert a room size?

Multiply length by width first in one unit, then convert the area. A room 4 m by 5 m is 20 m², which is 215.3 ft².

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