Centimeters to yards (cm to yd)

One centimeter is exactly 0.010936133 yards. That is a definition rather than a measurement: the imperial and US customary units were fixed against metric ones by the 1959 international yard and pound agreement, so this factor does not drift and will not be revised.

Worked through: 150 cm x 0.010936133 = 1.64042 yd.

Going the other way, one yard is 91.44 centimeters.

For mental arithmetic: Divide by 90 and take off 1.6%. Or divide by 91.44 exactly.

The crossing that a dressmaking pattern forces. European patterns and fabric sellers work in centimeters and meters, American ones in yards, and a pattern that needs 150 cm of fabric needs 1.64 yards, which in a shop that cuts in eighths of a yard means buying 1 3/4. A yard is 91.44 cm, so a meter of fabric is about 9% more than a yard, and swapping one for the other in either direction leaves a garment short or a budget long. Fabric widths cross the same line: the common 150 cm width is sold in the US as 58 to 60 inches.

Precision is worth matching to the input. A measurement given as 10 cm carries one or two significant figures, and reporting its conversion to six implies a precision the original never had.