Calculate the amount of stucco mix needed for your exterior wall project. Enter the wall area and number of coats to estimate bags of stucco for the scratch coat, brown coat, and finish coat. Includes estimates for lath, fasteners, and expansion joints.
Enter Your Measurements
Results
Total Stucco Bags (80 lb)
22
bags
Net Wall Area
383
sq ft
Scratch Coat Bags
9
bags
Brown Coat Bags
8
bags
Finish Coat Bags
5
bags
Metal Lath Rolls
4
rolls
Formula
How to Use This Calculator
How to Use
- 1
Enter the total wall area in square feet.
- 2
Enter the number of doors and windows to deduct from the area.
- 3
Select 2 coats for repair work or 3 coats for new stucco application.
Frequently Asked Questions
Frequently Asked Questions
How many coats of stucco are needed?
How much does stucco cost per square foot?
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About This Calculator
This calculator uses the formula: Scratch Coat = Net Area ÷ 45 bags | Brown Coat = Net Area ÷ 50 bags | Finish Coat = Net Area ÷ 80 bags. All calculations follow industry-standard methods. Results are estimates — always verify with a licensed professional for structural or code-compliant work.
Built and maintained by the CalcSmart team. Last updated March 2026.
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