rai to hectares | Exact Decimal + Formula

1 Rai (Thailand) = 0.16 Hectare

One hectare equals about 6.25 rais (exactly 6.25 rai). Real-world use: thai land measurement; four ngan make one rai. This page expresses those values in hectares, which is used for agricultural land, parks, and property measurement in most of the world. Type a value above for an instant answer; the exact formula and the reference table are below.

About Rai (Thailand) and Hectare

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.

Hectare (ha)

A hectare is exactly 10,000 square meters, about 2.471 acres.

Where it's used: Agricultural land, parks, and property measurement in most of the world.

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Precision

Formula

ha = rai × 0.16

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

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Rai (Thailand) to Hectare: Quick Reference Table

Rai (Thailand)	Hectare (Decimal)	Fraction	Real-world equivalent
0.001 rai	0.00016 ha	-	fractional unit measurement
0.01 rai	0.0016 ha	-	fractional unit measurement
0.1 rai	0.016 ha	1/64 ha	fractional unit measurement
0.5 rai	0.08 ha	5/64 ha	fractional unit measurement
1 rai	0.16 ha	5/32 ha	fractional unit measurement
2 rai	0.32 ha	5/16 ha	fractional unit measurement
5 rai	0.8 ha	51/64 ha	fractional unit measurement
10 rai	1.6 ha	1 19/32 ha	standard single unit scale
25 rai	4 ha	-	standard single unit scale
50 rai	8 ha	-	standard single unit scale
100 rai	16 ha	-	multiple unit increments
250 rai	40 ha	-	multiple unit increments
500 rai	80 ha	-	multiple unit increments
1000 rai	160 ha	-	multiple unit increments

rai to ha Formula and Examples

Direct Formula ha = rai × 0.16

Inverse Formula rai = ha × 6.25

Mental Math Shortcut

Divide the value by roughly 6.3 to quickly estimate the converted result.

Common Rai (Thailand) to Hectare Calculations

5 rai = 0.8 ha
10 rai = 1.6 ha
50 rai = 8 ha
100 rai = 16 ha
500 rai = 80 ha

Precision & Practical Use

For example, 10 rai = 1.6 ha — roughly standard single unit scale.

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.

Related Specialist Area Calculators & Niche Tools

Area conversions (square feet, square meters, acres, and hectares) are vital in real estate, landscaping, and construction. However, ordering materials requires converting flat surface measurements into material counts.

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 Hectare

How many hectares are in one rai (thailand)?

One Rai (Thailand) (rai) equals 0.16 Hectare (ha). To convert rai (thailand)s to hectares, multiply the rai (thailand) value by 0.16.

How do I convert Rai (Thailand) to Hectare?

Multiply your rai (thailand) value by 0.16 to get the result in Hectare: ha = rai × 0.16. For example, 5 rai = 0.8 ha.

What is the formula for converting rai to ha?

The conversion formula is ha = rai × 0.16. 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 ha?