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Paint coverage calculator
Gallons of paint for a wall + ceiling area, with two-coat default and primer toggle. Covers the 350-400 sf/gal standard plus the rule-of-thumb adjustments for porous substrates.
Paint (top coats)
10 gal
Exact: 10.0 gal across 2 coats @ 400 sf/gal
Primer (1 coat)
5 gal
Exact: 5.0 gal
Standard formula: gal = area × coats ÷ coverage_sf_per_gal. Coverage rates assume good prep + standard interior latex. Bump up for high-build product or dark-over-light recoat.
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