01
Length Converter
Converts between 15 length and distance units instantly, showing the exact conversion factor…
Acre to Dunam
Converts acre to dunam with the exact defined factor. One acre is 4.04686 dunam.
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Enter a value to convert.
In short
One acre is 4.04686 dunam, so to convert acre to dunam you multiply by 4.04686, and to go back you multiply dunam by 0.247105. 2 acre is 8.09371 dunam, 5 is 20.2343 and 10 is 40.4686. The modern dunam is 1000 m2 exactly — a tenth of a hectare — which makes it the easiest land unit on this page to work with. That figure is the metric dunam, adopted across the region in the twentieth century; the older Ottoman dunam was about 919 m2, so historical documents and modern deeds do not agree. The dunam is used in Turkey, Israel, Palestine, Jordan, Lebanon, Syria, Iraq and the Balkans, where it is written donum, dunam, dunum or dhiraa depending on the country.
How to use the Acre to Dunam
- Type the value you want to convert.
- Pick the unit you are converting from and the unit you want.
- The converted value and the exact conversion factor are shown instantly.
About the Acre to Dunam
The modern dunam is 1000 m2 exactly — a tenth of a hectare — which makes it the easiest land unit on this page to work with. That figure is the metric dunam, adopted across the region in the twentieth century; the older Ottoman dunam was about 919 m2, so historical documents and modern deeds do not agree.
What people use it for
- Reading a listing or a document quoted in acre.
- Checking a figure someone else converted.
- Getting the exact factor to reuse in a spreadsheet.
Details
| 1 Acre | 4.04686 Dunam |
|---|---|
| 1 Dunam | 0.247105 Acre |
| Definition | 1 dunam = 1000 m2 = 0.1 hectare = 0.2471 acre. The Ottoman dunam was about 919 m2. |
| Used in | Turkey, Israel, Palestine, Jordan, Lebanon, Syria, Iraq and the Balkans, where it is written donum, dunam, dunum or dhiraa depending on the country |
| Conversion type | Exact multiplication — both units are defined against the Square metre |
The maths behind it
This tool uses dunam = acre × 4.04686, an exact defined factor with no offset. Every intermediate value is shown on screen, so the result can be checked by hand.
1 dunam = 1000 m2 = 0.1 hectare = 0.2471 acre. The Ottoman dunam was about 919 m2.
Frequently asked questions
Is a Turkish donum the same as an Israeli dunam?
Today yes — both are the metric 1000 m2. They share an Ottoman origin, and both countries standardised on 1000 m2, so a Turkish donum and an Israeli or Jordanian dunam are the same area. Only pre-metric records differ.
What is the exact factor?
One acre is 4.04686 dunam, and one dunam is 0.247105 acre. It is a defined value rather than a measurement, so it does not change and the conversion is exact in both directions.
Is there a limit on how often I can use the Acre to Dunam?
Free, unlimited, and no email address required. You can use it a hundred times a day and nothing changes.
Can you see what I put into this page?
No. The Acre to Dunam runs entirely in your browser using JavaScript. Because the work happens locally, the page also keeps working if your connection drops, and closing the tab is all it takes to discard everything.
How is the result calculated?
It uses dunam = acre × 4.04686, an exact defined factor with no offset. The full working is printed under the result, so you can follow every step rather than trusting a black box.
What do I get if I try it?
Enter 10 acre and the Acre to Dunam returns 40.4686 dunam.
What do people use the Acre to Dunam for most?
The jobs it is built for: reading a listing or a document quoted in acre. Checking a figure someone else converted. Getting the exact factor to reuse in a spreadsheet. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
Is there anything to watch out for?
1 dunam = 1000 m2 = 0.1 hectare = 0.2471 acre. The Ottoman dunam was about 919 m2.
Which values should I know?
1 Acre is 4.04686 Dunam. 1 Dunam is 0.247105 Acre. Definition is 1 dunam = 1000 m2 = 0.1 hectare = 0.2471 acre. The Ottoman dunam was about 919 m2.. These are printed on the page itself, so you do not have to take them on trust.
Is the number rounded?
The calculation runs in double precision and the result is shown to ten significant figures, so converting a value and converting it back returns the original. What is displayed is rounded for readability; what is copied is not.
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