What does this tool do?
Stucco is applied in coats and ordered by the bag, with coverage falling as thickness rises. This calculator uses a typical 0.75 cu ft yield per 80 lb bag, deducts openings and adds 10% waste.
The Formula
Coverage per bag = 0.75 ft³ ÷ (Thickness ÷ 12); Bags = ⌈Net wall area × 1.10 ÷ Coverage⌉Frequently Asked Questions
How thick is a three-coat stucco wall?
About 7/8 in in total: roughly 3/8 in scratch, 3/8 in brown and 1/8 in finish. Enter the total thickness you plan to build.
How many bags of stucco per square foot?
An 80 lb bag covers about 18 sq ft at 1/2 in, so 300 sq ft needs around 17 bags before waste.