Free Printable Paint Quantity Calculator — Cans Needed Per Surface PDF
Per-surface area × coats ÷ sq-ft-per-can with brand / sheen / cost columns — turns the wall area number into the right number of cans.
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Buying ‘extra’ paint is expensive twice — once to buy, once to dispose
Sq ft / can is the label number — varies 250–400 sq ft. Read your specific can; the formula falls apart on assumed coverage.
Coats column flags primer + 2 finish coats vs the optimistic ‘one coat’ marketing — most rebates require the actual coat count.
Pair with Room Measurement Worksheet — Area column there is the input here. Different from a budget sheet: this is the conversion, not the tally.