Plaster Mix Calculator

Calculate mixing ratios and material quantities for different plaster types and applications.

Plaster Type

Wall Length (ft)

Wall Height (ft)

Plaster Thickness (inches)

Openings to Deduct (sq ft)

Waste Factor (%)

Total Plaster Needed

0 lbs

Mix Ratio: -

Coverage Area

0 sq ft

Number of Coats

Base Material

0 lbs

Gypsum

Sand / Aggregate

0 lbs

Water Needed

0 gal

Bags (50 lb)

Plaster Types and Mix Ratios

Gypsum Plaster: Pre-mixed, 1 part gypsum to 0.5 parts perlite. Interior only.
Lime Plaster: 1 part lime putty : 3 parts sand. Breathable, flexible.
Cement Plaster: 1 part cement : 4-6 parts sand. Durable, waterproof.
Venetian Plaster: Lime putty based, applied in thin burnished coats.

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