Use this free online calculator to convert Rai to Square Mile [Survey U S Statute] instantly. This area conversion tool provides accurate results for all your measurement needs.

Quick Reference

1 Rai = 6.178e-4 Square Mile [Survey U S Statute]

1 Square Mile [Survey U S Statute] = 1618.75 Rai

Rai to Square Mile [Survey U S Statute] Conversion Formula

To convert Rai to Square Mile [Survey U S Statute], multiply by 6.178e-4.

Square Mile [Survey U S Statute] = Rai × 6.178e-4

Rai = Square Mile [Survey U S Statute] × 1618.75

To convert Square Mile [Survey U S Statute] back to Rai, divide by 6.178e-4 (or multiply by 1618.75).

About These Units

About Rai

The rai is a traditional unit of land area in Thailand. The rai is now considered to equal exactly 1600 square meters, which is 0.16 hectare or approximately 0.3954 acre. The rai is divided into 4 ngan. The unit is called the hai in northern Thailand and the lai in Laos. The word means "field," that is, an upland field rather than a rice paddy.

About Square Mile [Survey U S Statute]

The square mile [survey, U.S. statute] is a unit of area used in U.S. land surveying, equal to the area of a square with sides of one survey statute mile. It equals 640 acres and is used for township mapping.

Rai to Square Mile [Survey U S Statute] Conversion Table

Rai	Square Mile [Survey U S Statute]	Square Mile [Survey U S Statute]	Rai
0.1	6.178e-5	0.1	161.8749
0.5	3.089e-4	0.5	809.3745
1	6.178e-4	1	1618.75
2	1.236e-3	2	3237.50
5	3.089e-3	5	8093.75
10	6.178e-3	10	16187.49
20	0.012355	20	32374.98
25	0.015444	25	40468.73
50	0.030888	50	80937.45
100	0.061776	100	161874.91
250	0.154440	250	404687.27
500	0.308880	500	809374.53
1000	0.617761	1000	1618749.06

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