Stucco Siding Calculator
Stucco is a wet-applied system rather than a piece-counted product, so this calculator estimates finish coat material by bag coverage — a rough planning number, not an order count.
Project type
Wall measurements
Enter each wall's length and height in feet and inches. Wall area = length × height.
Gable ends
No gables added. Gable area = base × rise ÷ 2.
Windows & doors
No openings added. Each opening's area is subtracted from your gross siding area.
Siding material
Waste factor
Waste accounts for cuts at corners and openings, gable angles, damaged pieces, and pattern matching. 10% is a common starting point for a simple rectangular home; complex roof lines or diagonal cuts often need more.
Trim & accessories
Actual accessory requirements vary by installation method and manufacturer — use these as a starting checklist, not a final order.
08Cost estimateOptional
Applied to area including waste — what you'll actually buy.
Applied to net wall area — what installers actually cover, before waste.
Enter your own prices for the most accurate estimate for your area. Leave fields blank or at 0 to exclude them.
Preview
Estimated siding needed
Net area
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Waste added
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Total area (w/ waste)
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Siding squares
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Stucco units
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Est. total cost
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How we calculated this
Trim & accessories
Want professional installation?
Bring this estimate to local siding contractors when comparing quotes, or reach out with questions.
Contact usHow it's calculated
- 1. Net siding area = gross wall and gable area minus openings.
- 2. Required area = net area plus your waste allowance (12% is a common starting point for stucco).
- 3. Bag coverage defaults to 100 sq ft per 80 lb bag of finish coat — edit this to match your product label.
- 4. Bags needed = required area ÷ bag coverage, rounded up.
Worked example
A home with 1,400 sq ft of net wall area and a 12% waste factor:
| Net area | 1,400 sq ft |
| Plus 12% waste | +168 sq ft |
| Required area | 1,568 sq ft |
| Siding squares | 15.68 squares |
| Bags to order | 16 bags |
This covers the visible finish coat only — a full 3-coat system also needs lath, scratch coat, and brown coat material, which vary too much by wall condition to estimate here.
Assumptions
- • Bag coverage varies by product and by scratch/brown/finish coat thickness — the default is a generic starting point for finish coat only.
- • Traditional stucco is a labor-intensive, multi-coat wet system — labor is typically a larger share of total cost here than for panel or board siding.
- • A 12% waste factor is typical, but complex trim, arches, or heavy texture can increase this.
Tips
- • Confirm coverage per bag on your specific product’s label — thickness and texture style both change it significantly.
- • Budget separately for lath and the scratch and brown coats if this is a full 3-coat installation, not just a re-finish.
This is a planning estimate
Frequently asked questions
How much stucco do I need for my house?
Divide your required siding area (net area plus waste) by your product’s coverage per bag, then round up. Coverage varies by thickness and product, so check the bag label.
What waste factor should I use for stucco?
12% is a common starting point; increase it for heavy texture, arches, or walls with many corners and openings.
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