rai to dunam | Exact Decimal + Formula

1 Rai (Thailand) = 1.6 Dunam (Metric)

One rai equals about 1.6 dunams (exactly 1.6 dunam). Real-world use: thai land measurement; four ngan make one rai. This page expresses those values in dunams, which is used for land measurement in israel, palestine, turkey, and parts of the balkans. Use the calculator above, then check the reference table for common values from 0.001 to 1000.

About Rai (Thailand) and Dunam (Metric)

Rai (Thailand) (rai)

A rai is a Thai area unit equal to 1,600 square meters (0.395 acre).

Where it's used: Thai land measurement; four ngan make one rai.

Dunam (Metric) (dunam)

A dunam (metric) is exactly 1,000 square meters (0.1 hectare).

Where it's used: Land measurement in Israel, Palestine, Turkey, and parts of the Balkans.

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Precision

Formula

dunam = rai × 1.6

To convert Rai (Thailand) to Dunam (Metric), use the formula displayed above.

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Rai (Thailand) to Dunam (Metric): Quick Reference Table

Rai (Thailand)	Dunam (Metric) (Decimal)	Fraction	Real-world equivalent
0.001 rai	0.0016 dunam	-	fractional unit measurement
0.01 rai	0.016 dunam	1/64 dunam	fractional unit measurement
0.1 rai	0.16 dunam	5/32 dunam	fractional unit measurement
0.5 rai	0.8 dunam	51/64 dunam	fractional unit measurement
1 rai	1.6 dunam	1 19/32 dunam	standard single unit scale
2 rai	3.2 dunam	3 13/64 dunam	standard single unit scale
5 rai	8 dunam	-	standard single unit scale
10 rai	16 dunam	-	multiple unit increments
25 rai	40 dunam	-	multiple unit increments
50 rai	80 dunam	-	multiple unit increments
100 rai	160 dunam	-	multiple unit increments
250 rai	400 dunam	-	multiple unit increments
500 rai	800 dunam	-	multiple unit increments
1000 rai	1600 dunam	-	multiple unit increments

rai to dunam Formula and Examples

Direct Formula dunam = rai × 1.6

Inverse Formula rai = dunam × 0.625

Mental Math Shortcut

Multiply the miles value by 1.6 to quickly estimate the distance in kilometers.

Common Rai (Thailand) to Dunam (Metric) Calculations

5 rai = 8 dunam
10 rai = 16 dunam
50 rai = 80 dunam
100 rai = 160 dunam
500 rai = 800 dunam

Precision & Practical Use

For example, 10 rai = 16 dunam — roughly multiple unit increments.

Real-estate and construction figures are usually rounded to the nearest square foot or square meter. Keep 2–3 significant figures unless you're doing engineering takeoffs.

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In home remodeling, flat wall and floor square footages are converted by paint coverage calculators (estimating paint gallons needed) or tile calculators (estimating tile counts, accounting for grout lines and a 10% waste factor). For roofing jobs, surface area is measured in roofing 'squares' (1 square = 100 sq ft). Landscapers use area calculators to estimate bulk mulch and topsoil volume in cubic yards. These specialized calculators bridge the gap between flat dimensional area and commercial material purchasing.

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How to Convert Rai (Thailand) to Dunam (Metric)

How many dunam (metric)s are in one rai (thailand)?

One Rai (Thailand) (rai) equals 1.6 Dunam (Metric) (dunam). To convert rai (thailand)s to dunam (metric)s, multiply the rai (thailand) value by 1.6.

How do I convert Rai (Thailand) to Dunam (Metric)?

Multiply your rai (thailand) value by 1.6 to get the result in Dunam (Metric): dunam = rai × 1.6. For example, 5 rai = 8 dunam.

What is the formula for converting rai to dunam?

The conversion formula is dunam = rai × 1.6. Use the calculator above for any value, and see the reference table below for common inputs from 0.001 to 1000.

Is there a quick mental estimate for rai to dunam?