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Traditional 3-Coat Stucco Plaster Volume & Mass Calculator

Calculate the total plaster volume and mass for a traditional 3-coat (scratch/brown/finish) stucco application.

Computed in your browser — nothing you enter is uploaded. Figures are presented for United States against IRC 2024, and every formula is cited under regulatory standards below.

Last verified 2026-08-27 · v1.1.0

Market
Imperial · sales tax

Total stucco mass needed

4563.57 lb

High confidence
Total plaster volume
1.5 yd³
Combined coat thickness
0.91 in

For the dimensions entered, expect a total stucco mass needed of 2070 kg. Set for United States against IRC 2024. The market selector changes both the units and the code cited.

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.

Preliminary estimate, not certified engineering. This tool produces an indicative quantity calculation for planning purposes only — it is not a certified structural analysis, a guaranteed material takeoff, or a substitute for building department approval. Always verify measurements on-site and have a licensed contractor or structural engineer review any load-bearing, code-sensitive, or safety-critical work before purchasing materials or starting construction. Spotted an arithmetic or standards error? Report it to contact@craftquantities.com with your inputs — confirmed fixes become pinned regression tests.

[Schema Verified] Computed in alignment with American Concrete Institute (ACI 318-19) formulas and International Residential Code (IRC 2024) spatial boundaries.

Regulatory standards & verification citations

  • 3-coat stucco system volume = wall area × combined coat thickness (scratch + brown + finish); mass = volume × stucco mix density (commonly ~1800 kg/m³ for a portland cement stucco mix)

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Frequently asked questions

Why does the finish coat use so much less material than the scratch or brown coats?
The finish coat is applied much thinner (commonly 1.5-6 mm) than the scratch and brown coats (commonly 6-16 mm each), since it only needs to provide the final texture and color rather than build up the wall's structural plaster thickness.
Where does the 1800 kg/m³ density figure come from?
It is a commonly cited wet density for a portland cement stucco mix. Actual density varies by mix design and manufacturer, so check your specific product's data sheet for a precise figure if you need a tighter material estimate.
Does this account for material lost to overspray, rebound, or uneven substrate?
No — this is a straight area × combined thickness × density calculation. Waste from application method, substrate irregularity, and mixing losses should be added on top of this base quantity.