Yards to Wa (Thai) (yd to wa)

1 yard equals 0.4572 wa (Thai) exactly.

1 yard = 0.4572 wa (Thai)

How to convert yards to wa (Thai)

To convert yards to wa (Thai), multiply the number of yards by 0.4572. This factor is exact. To go the other way, multiply wa (Thai) by 2.187226597 (rounded).

wa (Thai) = yards × 0.4572

Example: 10 yards = 4.572 wa (Thai).

About these units

Yard (yd)

US & ImperialCurrent unit

3 feet or 36 inches, exactly 0.9144 meters. Used for sports fields, fabric and short distances in the US and UK.

Yard descends from the Old English gerd or gyrd, meaning a branch, stave or measuring rod. It first appears in the late seventh-century laws of Ine of Wessex, though there it names a tax unit, the yardland. Around 959 to 963 King Edgar ordered that the measure held at Winchester be used throughout his realm, the earliest record of a prototype. A story that Henry I fixed the yard as the distance from his nose to his thumb is later folklore, and the true origin, whether pace, cubit or waist, remains speculative.

Britain defined the Imperial Standard Yard in 1824 as the distance between two marks on a brass rod at 62 degrees Fahrenheit. A fire in 1834 damaged the standard, a replacement was made in 1845, and the Weights and Measures Act 1855 recognized it. The 1959 international agreement then fixed the yard at exactly 0.9144 meter. Today it measures American and Canadian football fields, association football pitches and cricket pitches, appears on UK road signs for short distances, and is still used to sell fabric in the US and UK.

1 yard = 0.9144 meters (exactly).

Sources: Wikipedia: Yard; Wikipedia: Inch; NIST Guide to the SI, Appendix B.8: conversion factors

Wa (Thai) (wa)

ThaiTraditional unit (still used in some regions)

Exactly 2 meters, the Thai fathom. Used in land measurement alongside the rai.

Wa is the Thai fathom, a length of 2 meters. It belongs to a traditional Thai scale built on the human body, in which the khuep (span) is 25 cm, the sok (cubit) is 50 cm, and four sok make one wa, the span of outstretched arms.

Larger distances were counted in the sen, which is 20 wa, and the long road measure yot, equal to 400 sen. Surveyors working on the Royal Thai Survey Department cadastral survey, begun in 1896, tied these units to metric lengths, and the wa kept the round value of 2 m that it carries today.

Because the metric figure is exact, the old body-based uncertainty has gone. A wa still appears in land deeds and frontage descriptions, and in daily speech a plot may be described as so many wa wide. It is also the side of the square wa, which is 4 square meters.

1 wa (Thai) = 2 meters (exactly).

Sources: Wikipedia: Thai units of measurement; Wikipedia: Rai (unit)

Related conversions

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