Convert Dunam to Acre (dunam → ac)

Converting dunams to acres is straightforward: multiply by the conversion factor. Follow these three steps to do it by hand or in your head.

1. 1
   Take your value in dunams

   Start with the number of dunams (dunam) you want to convert.
2. 2
   Multiply by 0.247105

   The conversion factor from dunam to ac is 0.247105. Multiply your value by this number.
3. 3
   Read the result in acres

   The result is your value in acres (ac).

Multiply the value in dunams by 0.247105. For the reverse direction, multiply by 4.046856.

• ✓1 dunam = 1000 m² = 0.1 ha.
• ✓10 dunams = 1 hectare.
• ✓Historical Ottoman dunam was 919.3 m² — avoid if possible; modern is 1000.

• ✗Using Ottoman dunam figures in modern Turkish contracts — assume metric.
• ✗Confusing with other Middle Eastern units (feddan, etc.).
• ✗Assuming all regional dunams are identical — confirm modern 1000 m² value.

What is the Dunam?

The dunam equals exactly 1,000 square meters in its modern metric form, used primarily in Israel, Jordan, Lebanon, Palestine, Syria, and Turkey for land measurement and real estate. The unit's name derives from Ottoman Turkish 'dönüm,' itself from a verb meaning 'to turn' — historically the area a yoke of oxen could plow in a day, similar to the acre's origin. Older 'Ottoman dunam' values varied (around 919 m²), but most countries in the region have standardized to the metric dunam of 1,000 m². The dunam is the everyday unit in Middle Eastern real estate and agricultural contexts. It relates to the square meter (1 dunam = 1,000 m² = 0.1 ha), the hectare (10 dunams = 1 ha), and the acre (1 acre ≈ 4.047 dunams). Family olive groves, vineyards, and urban building plots are routinely measured in dunams.

• Israeli and Palestinian land records
• Turkish rural property
• Agricultural documents in the former Ottoman region

What is the Acre?

The acre equals exactly 4,046.8564224 square meters (or 43,560 square feet) and is the standard unit for American and British farmland, real estate, and recreational property. The unit's origin is medieval: an acre was the area a yoke of oxen could plow in one day, traditionally a strip 1 furlong (660 ft) by 1 chain (66 ft). Despite metric adoption in many fields, the acre persists in property records throughout the US and UK. A standard American football field (excluding end zones) is about 1.32 acres. The largest US state, Alaska, contains about 365 million acres. The acre relates to the square foot (43,560 ft² = 1 acre), the hectare (1 ha ≈ 2.471 acres), the square mile (640 acres = 1 mi²), and the square meter (1 acre ≈ 4,047 m²). US farms average around 446 acres, and the average UK farm is about 215 acres.

• US farmland and ranches
• UK rural property and estates
• Canadian rural property (legal survey system)