What every result keeps visible
- Formula ID, version, internal QA status and planning boundary.
- Inputs, assumptions, allowance and purchase-rounding effect.
- Editable estimate costs that remain distinct from material quantity.
8 tested tools in painting
Painting calculators
Plan interior, primer, exterior and trim paint gallons from area, coats and openings. Wallpaper lives here. Drywall sheets sit on the drywall trade page.
Formula-first tool library
Choose the right painting calculator.
Paint calculator
Room wall area, opening deductions, coats and rounded paint purchase quantity.
Open calculatorWall paint calculator
Straight-wall paint coverage, coats, allowance and whole-gallon purchase quantity.
Open calculatorCeiling paint calculator
Ceiling paint coverage, coats, allowance and whole-gallon purchase quantity.
Open calculatorPaint cost calculator
Preliminary finish-paint material cost from whole gallons, a stated rate and visible allowance.
Open calculatorWallpaper calculator
Single-roll count from room perimeter, ceiling height, opening deductions and the usable coverage printed on the roll.
Open calculatorPaint primer calculator
Primer gallons from room walls, openings, coats and labelled primer coverage. Finish paint is a different tool.
Open calculatorExterior paint calculator
Exterior-paint gallons from wall length, height, openings, coats and labelled coverage. Interior rooms use the paint calculator.
Open calculatorPaint trim calculator
Trim-paint gallons from linear footage, coats and labelled linear coverage per gallon.
Open calculatorCommon question
Does coverage come from Construclytic?
These are transparent planning aids, not engineering, code, installation or final supplier specifications. Confirm actual job requirements before construction.