Interior & Exterior Wall Paint Coverage, Gallons & Liters Estimator
Calculate exact paint liters, US gallons, primer cans, and buckets needed for multi-coat wall and ceiling painting with window/door deductions.
Total Paint Required (Liters)
Calculator Inputs
Total Paint Required (Liters)
Volume in US Gallons
Standard 15L Paint Buckets
Undercoat Primer Needed (Liters)
Net Surface Area to Paint
Net Painted Area vs. Openings Deducted
Unprimed drywall, fresh stucco, or porous masonry absorb approximately 15-20% more paint on the initial coat.
All engineering calculations, structural estimates, and electrical sizing metrics are provided for preliminary estimation only. Always ensure compliance with relevant statutory building codes and occupational safety standards, verified by a certified professional engineer before practical implementation.
Calculation Methodology
Net Area = Gross Wall Area - Window/Door Openings. Total Liters = (Net Area * Coats / Coverage Rate) * (1 + Waste%).
Frequently Asked Questions
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