SettingsSettings for this calculationUS
The total perimeter of exterior walls to be stuccoed.
Add up the length of every exterior wall around the building.
Tools needed: Tape measure or measuring wheel
The average height from foundation to eave.
Calculate gable ends separately if they're a significant area.
Tools needed: Tape measure
Doors aren't stuccoed over.
Each standard door opening is assumed to be about 1.95 m².
Windows aren't stuccoed over.
Each standard window opening is assumed to be about 1.4 m².
Estimated stucco needed
12 bags
Stucco coverage varies by product and number of coats (scratch, brown, finish) — this estimates a single finish-coat pass using a common average; check your specific product for multi-coat systems.
- Net wall area
- 1,137.46 sq ft
They open the calculator with your figures already in it
Stucco Calculator: 12 bags — shown in imperial, US market. The link sets both, so the result they see is the one on your screen.
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How this was calculated
Formula source(s)
- An 80 lb bag of stucco mix commonly covers approximately 100 sq ft at standard application thickness — always confirm against your specific product's coverage chart
Inputs used
- Total Wall Length (perimeter)
- 130 ft
- Average Wall Height
- 10 ft
- Number of Doors
- 2
- Number of Windows
- 8
Intermediate steps
- Net wall area
- 1,137.46 sq ft
Confidence note: Stucco coverage varies by product and number of coats (scratch, brown, finish) — this estimates a single finish-coat pass using a common average; check your specific product for multi-coat systems.
What this calculation does not cover
- Openings are deducted at fixed sizes — 1.95 m² (about 21 sq ft) per door and 1.4 m² (about 15 sq ft) per window — so a garage door or a full-height picture window takes off no more area than a small casement, and that flat deduction also ignores the mix carried around into the jamb and head reveals of every opening.
- Nothing is added for waste: the answer is the net area divided by the coverage figure and rounded up to the next whole bag, with no allowance for mix that bounces back off the wall, stiffens on the board before it is used, or is left in the mixer and hose.
- Substrate and texture get no input of their own, so the same 100 sq ft per bag is assumed over a damp, smooth base as over dry open masonry that drinks the mix, and for a tight sand finish as for a deep dash or lace.
- Wall area is taken as perimeter × one average height — a single rectangle — so gable triangles, dormer cheeks and soffit returns sit outside it, and a partial application such as a stucco band above a brick base has to be entered as its own length and height rather than the building's.
- Should the openings you enter come to more than that rectangle, the net area is floored at zero and the result is simply zero bags, rather than a warning that the two measurements disagree.
- Only the bagged mix is counted: weep screed, casing bead, corner aid and control joints are separate orders, as is the pigment for an integrally coloured finish.
Estimated cost — your price
This site holds no price list for this material — local prices vary too much to publish honestly. Enter your supplier's price and the result is costed with it.
Part of a bigger job
Or plan the space itself: measure it once, doors and windows included, and this figure comes back worked out on that space, with what goes with it.
Computed in your browser — nothing you enter is uploaded. Presented in US customary units and US trade terminology. Where a formula follows a published standard, that standard and its edition are cited beside it on this page; where none governs, the page says so. Local amendments override model codes — verify against the code in force where you build.
Sources checked 2026-09-05 · in the site-wide review of 2026-09-06 · v1.0.1
Regulatory standards & verification citations1
- An 80 lb bag of stucco mix commonly covers approximately 100 sq ft at standard application thickness — always confirm against your specific product's coverage chart
Cite this page
Your workspace
Most jobs need more than one number. Add the calculators you need next and they open right here, underneath this one — your figures stay on screen and nothing is lost to a page change.
Tools and safety for this job
To skim a plaster finish. Generic types, no brands, no prices.
Protection this work requires
- Wet cement and lime burn skin and eyes painlessly until the damage is done: waterproof gloves to EN 374, safety glasses whenever the mix can splash, and never kneel in wet mix in permeable trousers.
- Most fatal falls on small jobs are from under three metres: use a tower or a ladder tied at the top, and never work off the top two rungs.
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Essential
Mixing bucket or tub
Paddle mixer
Plastering trowel and hawk
Recommended
Step ladder
what each plastering tool is for, and the spec that decides which to buy where one does.