Ruutjard, tähis yd², on Briti ja USA mõõdusüsteemi pindalaühik, mis vastab ühe jardi (3 jala) pikkuste külgedega ruudu pindalale; seejuures 1 ruutjard võrdub 9 ruutjala, 1 296 ruuttolli ja 0,836 ruutmeetriga. Ruutjardi kasutati ja harva kasutatakse ka praegu pindala alusel müüdavate materjalide, nt vaipade, kangaste, murumätaste ja põrandakatete mõõtmiseks.
A square yard (symbol yd2) is an imperial and US customary unit of area equal to the space inside a square with sides measuring one yard (3 feet) long; 1 square yard equals 9 square feet, 1,296 square inches, and 0,836 square meters. A square jard uses for measuring materials sold by coverage, such as carpet, fabric, sod, and flooring.
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