How many bags of stucco do I need?

Multiply the wall area by the number of coats, divide by the coverage per bag, and add waste. Coverage varies by product, so check the bag.

How much does a bag of stucco cover?

An 80 lb bag typically covers around 25 square feet at a 3/8 inch thickness, but it varies by product and coat — use the figure on the bag.

How many coats of stucco are there?

Traditional three-coat stucco has a scratch, brown, and finish coat; one-coat systems also exist. Set the coats to match your system.

Stucco Calculator

Work out how many bags of stucco or plaster you need. Enter the wall area, the number of coats, and the coverage per bag to get the bag count with a waste allowance.

Stucco calculator

Coverage per bag varies a lot by product and coat thickness — use the figure on your bag. Default is roughly 25 ft² per 80 lb bag at a 3/8 inch coat.

How it's calculated

We multiply the wall area by the number of coats, divide by the coverage per bag, add a waste allowance, and round up to whole bags.

Frequently asked questions

How many bags of stucco do I need?: Multiply the wall area by the number of coats, divide by the coverage per bag, and add waste. Coverage varies by product, so check the bag.
How much does a bag of stucco cover?: An 80 lb bag typically covers around 25 square feet at a 3/8 inch thickness, but it varies by product and coat — use the figure on the bag.
How many coats of stucco are there?: Traditional three-coat stucco has a scratch, brown, and finish coat; one-coat systems also exist. Set the coats to match your system.

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Last updated June 2026.