Stucco calculator

200 sq ft at 3/4 in base: 20 bags of base, 3 of finish.

Droppings and a rough wall. The bag range already runs wide, so this starts at 0.

Job sheet

Plumb stucco job sheet

200 sq ft to cover. Base uses the low end of the bag range.

  • Base, 80 lb20 bags10 to 12 sq ft per bag. The high end would be 17 bags.
  • Finish, 80 lb3 bags70 sq ft per bag at 1/8 in. Finish is a separate product.
Plumb stucco job sheet
200 sq ft to cover. Base uses the low end of the bag range.

Base, 80 lb: 20 bags (10 to 12 sq ft per bag. The high end would be 17 bags.)
Finish, 80 lb: 3 bags (70 sq ft per bag at 1/8 in. Finish is a separate product.)

Low end of the printed range

An 80 lb bag of Scratch and Brown covers 20 to 24 square feet at 3/8 inch, 15 to 18 at 1/2 inch, and 10 to 12 at 3/4 inch. The sheet divides by the smaller number and rounds up. The detail line shows how many bags the optimistic end would have been. Finish is 70 square feet per 80 lb bag at 1/8 inch, from the selector guide, and it is not the same mix. Wall area can come from square feet. Lap siding on the same wall is siding.

FAQ

How many bags of stucco for 200 square feet?

At 3/4 inch of base coat, the data sheet’s low end is 10 square feet per 80 lb bag, so 200 square feet is 20 bags. The high end of that same row is 12 square feet, which would be 17 bags. Finish coat at 1/8 inch is a different bag: 70 square feet each, so 3 bags. Buy the low-end count unless you have already proved the wall covers more.

How thick is a three-coat stucco wall?

Over metal lath, the usual build is a 3/8 inch scratch coat, a 3/8 inch brown coat, and a 1/8 inch finish. That is 3/4 inch of base coat plus the finish. Over masonry, two coats can be thinner. This page does not pick the system. It counts bags at the thickness you type.

Does one bag cover the base and the finish?

No. Scratch and Brown No. 1139 is the base. Finish Coat is a separate 80 lb bag. The sheet prints both lines. Lath, weep screed, and corner bead are not in the bag count.

Sources

  1. QUIKRETE Scratch and Brown Base Coat Stucco, No. 1139: 80 lb bag yields about 0.75 cu ft. Coverage: 20 to 24 sq ft at 3/8 in, 15 to 18 at 1/2 in, 10 to 12 at 3/4 in.
  2. QUIKRETE Stucco Selector Guide: Finish coat: 70 sq ft per 80 lb bag at 1/8 in. Base coat rows match the 1139 data sheet.