How Much Paint for a 15×12 Room (10ft Ceiling)?
Deterministic architectural coatings takeoff for a 15ft × 12ft × 10ft enclosure (12×15 ft Room). Calculated for 2 professional coats over sealed substrate (375 sq ft/gal spread rate) with automatic deductions for standard doors and windows per Master Painters Institute guidelines.
Exact 2-coat volume: 3.5 gallons
Optimized for lowest retail cost
Mandatory over fresh joint compound
Covers 54 linear ft baseboard
Architectural Bill of Materials (Takeoff Summary)
Based on MPI architectural spread ratings with architectural openings deduction.
| Component & Coating Item | Specification & Coverage Rule | Net Area | Quantity Needed | Standard Package |
|---|---|---|---|---|
| Finish Wall Paint (2 Coats) | Interior Latex/Acrylic @ 375 sq ft/gal spread rate | 648 sq ft | 3.46 Gallons | 4 Gallon Can(s) |
| Ceiling Paint (Flat White) | Zero-glare high-hiding ceiling formulation (2 coats) | 180 sq ft | 0.96 Gallons | 1 Gallon Can(s) |
| PVA Drywall Primer / Sealer | High-solids vinyl acetate sealer for new drywall/patches | 648 sq ft | 3 Gallon(s) | 3 Gallon Can(s) |
| Trim & Baseboard Enamel | Semi-Gloss / Satin urethane enamel for baseboard moldings | 54 lin ft | 3 Quart(s) | 3 Quart Can(s) |
| Painter's Masking Tape | 1.41" Multi-surface blue painter's tape (60 yd / 180 ft rolls) | 54 ft border | 1 Roll(s) | Standard 60-yd Roll |
| Drop Cloths & Floor Protection | 9×12 ft Canvas or laminated leak-proof protective tarp | 180 sq ft floor | 2 Tarp(s) | 9×12 Canvas Tarps |
Includes surface prep, masking, cutting in edges, and rolling 2 coats.
Premium architectural paint ($48/gal), primer, tape, and roller sundries.
Standard interior drywall rating per Master Painters Institute (MPI).
Need Textured Walls, Multiple Colors, or Custom Doors?
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Frequently Asked Questions: 15ft × 12ft × 10ft Paint Takeoff
How many gallons of paint do I need for a 15x12 room with 10ft ceilings?
For a 15×12 ft room with 10 ft ceilings (walls and ceiling), you will need approximately 3.5 gallons for two coats, so you should purchase 4 gallon(s). This calculation assumes smooth previously painted drywall with a standard spread rate of 375 sq ft per gallon and accounts for door and window deductions.
Should I paint the ceiling the same color as the walls in a 15x12 room?
Most interior designers recommend a dedicated flat white ceiling paint with zero sheen to hide drywall joints and reflect ambient light, making the room feel taller. Painting walls and ceilings monochromatic is popular for modern moody designs, but flat ceiling paint reduces glare under overhead fixtures.
Do I need a separate primer coat before painting a 15x12 room?
If painting over bare drywall paper and fresh joint compound mud, applying 1 coat of PVA drywall primer (3 gallon(s)) is mandatory to prevent joint photographing. If repainting an existing sound painted surface with a similar color, two coats of quality paint-and-primer in one are generally sufficient.
How many coats of paint are necessary for full coverage?
Two coats are the professional Master Painters Institute (MPI) standard for durability, washability, and uniform color depth. Even premium 'one-coat hide' paints show subtle roller stipple and flash lines in single coats, especially during drastic color transitions.