Convert Dunam to Rai (dunam → rai)

Converting dunams to rais 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 0.625

   The conversion factor from dunam to rai is 0.625. Multiply your value by this number.
3. 3
   Read the result in rais

   The result is your value in rais (rai).

Multiply the value in dunams by 0.625. For the reverse direction, multiply by 1.6.

• ✓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 Rai?

The rai equals exactly 1,600 square meters (40 m × 40 m) and is the traditional Thai land unit, still officially used in Thailand for real estate, agriculture, and property records. The rai is divided into 4 ngan (each 400 m²), and 1 ngan equals 100 wa (each 4 m²). Despite Thailand's adoption of the metric system, the rai remains the everyday unit for buying and selling land in Thai contexts — a small urban plot might be 1 rai, while rural farms are quoted in tens or hundreds of rai. The rai relates to the square meter (1 rai = 1,600 m²), the hectare (1 ha = 6.25 rai), and the acre (1 acre ≈ 2.529 rai). The rai's exact metric definition (1,600 m²) makes conversion to SI units precise, unlike many traditional land units.

• Thai rural property and farmland
• Thai real-estate listings
• Agricultural yield reporting in Thailand