Masonry Paint Calculator
Estimate litres, containers, cost and remaining quantity for paint, primer, wood stain, varnish or decking oil using your own coverage. Use your total surface area and the product label coverage for masonry paint, primer or undercoat, wood stain or varnish, and decking oil. The same coverage applies to every coat; spare is added after all coats. Prefilled numbers are examples, not manufacturer coverage defaults. Openings, texture, porosity, dilution and application losses are not inferred. Arithmetic remaining litres are purchased minus required, not measured residue. This quantity model does not select products or application methods.
Use your total surface area and the product label coverage for masonry paint, primer or undercoat, wood stain or varnish, and decking oil. The same coverage applies to every coat; spare is added after all coats. Prefilled numbers are examples, not manufacturer coverage defaults. Openings, texture, porosity, dilution and application losses are not inferred. Arithmetic remaining litres are purchased minus required, not measured residue. This quantity model does not select products or application methods.
V = A × c ÷ r × (1 + w/100); N = ceil(V ÷ S); B = N × S; C = N × P; R = B − V
Inputs stay in this browser. Litres use at most 6 decimal places, money uses 2, and containers round upward.
Results
- Paint required (L)
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- Whole containers
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- Paint purchased (L)
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- Estimated cost
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- Arithmetic remaining (L)
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A QUICK WALKTHROUGH
How to use this tool
- Enter the total surface area and number of coats.
- Enter the product coverage, container size, waste allowance and price.
- Calculate and read the stated assumptions with the result.
Formula and assumptions
Use your total surface area and the product label coverage for masonry paint, primer or undercoat, wood stain or varnish, and decking oil. The same coverage applies to every coat; spare is added after all coats. Prefilled numbers are examples, not manufacturer coverage defaults. Openings, texture, porosity, dilution and application losses are not inferred. Arithmetic remaining litres are purchased minus required, not measured residue. This quantity model does not select products or application methods. V = A × c ÷ r × (1 + w/100); N = ceil(V ÷ S); B = N × S; C = N × P; R = B − V
Local processing
Inputs stay in this browser. Litres use at most 6 decimal places, money uses 2, and containers round upward.
GOOD TO KNOW
Common questions
Does this choose a paint or application method?
No. It only applies the entered coverage and price to the stated arithmetic model.