Paint Coverage Calculator
Calculate exactly how much paint you need for walls, ceilings, and trim based on surface type and coating requirements.
Screen paint quantity from room dimensions, direct wall area, opening deductions, local surface rows, color-change prompts, and application-method placeholders. The output keeps product TDS, selected primer, substrate condition, lead-safe work, spray ventilation, PPE, disposal, pricing, and qualified painter review outside the model.
Hanging new drywall before painting? Screen sheets and mud.
Drywall Estimator →Screen wallpaper rolls if an accent wall uses paper instead
Wallpaper Calculator →Screen siding material for exterior planning
Siding Material Calculator →Need a rough insulation takeoff before closing up walls?
Insulation Calculator →How It Works
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Enter Geometry
Enter room dimensions or direct wall area, then review opening deductions, ceiling selection, trim, closet, gable, and accent-wall rows.
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Select Local Surface Rows
Choose a surface row for walls and ceilings. These rows are local planning placeholders and must be replaced with the selected product label or TDS before purchase.
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Set Color Change
Use the color-change row to make tinted-primer and extra-coat prompts visible. Store tint guidance, selected product, and field coverage still control.
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Choose Application Method
Select roller, brush, or sprayer. The sprayer row is a material-add prompt only, not a transfer-efficiency, ventilation, respiratory-protection, fire-code, or AHJ decision.
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Review Source Warnings
Use the primer, topcoat, local cost, time, and warning rows as a takeoff starting point before checking product data, site safety, lead/RRP, pricing, and qualified review.
Built For
- Homeowners roughing out a room repaint before reading the selected paint and primer labels.
- Contractors preparing early material takeoffs before substituting product-specific coverage and current supplier pricing.
- Property managers screening turnover quantities while lead/RRP, repairs, color formula, and finish acceptance remain open.
- DIYers comparing dark-to-light or accent-wall scenarios before checking primer tint, surface prep, and safety requirements.
Assumptions
- Standard door openings are 21 sq ft (3' x 7') and standard windows are 15 sq ft (3' x 5').
- Local coverage rows are planning placeholders and are not manufacturer-certified product rows.
- Spray waste row is a material placeholder and not a safety, ventilation, respiratory-protection, fire-code, or transfer-efficiency result.
Limitations
- Does not validate product selection, label instructions, primer compatibility, coverage warranty, color hide, or final purchase quantity.
- Does not determine lead/RRP compliance, VOC/emissions rules, spray booth or ventilation requirements, PPE, disposal, or AHJ approval.
- Trim, doors, vaulted surfaces, millwork, repairs, stains, texture, moisture, and substrate conditions may require separate measurement and review.
References
- Manufacturer coverage source pointers: Benjamin Moore Regal Select TDS, Sherwin-Williams SuperPaint data page, and Behr Premium Plus product page.
- Safety/source pointers: EPA RRP contractor guidance, OSHA 1910.94, OSHA 1910.107, and NFPA 33 spray-application context.
Frequently Asked Questions
Learn More
How to Estimate Paint for Any Project
Coverage rates by surface type, when to prime, roller vs brush vs spray comparison, and how to avoid the most common paint quantity mistakes.
Drywall Estimating: Sheets, Mud, Tape, and Screws
Why per-surface sheet counting matters, joint compound calculation from actual joint footage, fire-rated assemblies, and a complete material checklist.
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