Ceiling Paint Calculator
Calculate how much ceiling paint you need. Supports flat, textured, popcorn, vaulted, and cathedral ceilings with automatic surface adjustment.
Last updated: March 8, 2026
Project Summary
Total Paint
0.8 gal
Base Area
144 sq ft
Adjusted Area (w/ texture)
144 sq ft
Est. Cost
$40
Ceiling Breakdown
Main Ceiling0.7 gal
144 sq ft × 1 = 144 sq ft
Shopping List
Paint:1 × 1-gallon can
Cost Estimate
Paint:$40
TOTAL:$40
*Estimate only. Actual costs vary by location, brand, and contractor.
Coverage Tips
- • Roll toward the main light source to minimize visible lap marks.
- • Ceiling paint is formulated thicker with anti-drip properties — recommended over wall paint.
How to Use This Calculator
- Set paint options — Choose number of coats (2 is standard) and paint finish. Flat/matte is best for most ceilings.
- Select ceiling type — Pick Flat, Textured, Popcorn, Vaulted, or Cathedral. The calculator adjusts coverage automatically.
- Enter dimensions — Input length and width for each ceiling. You can use feet or inches.
- Add more ceilings — Click "Add Ceiling" to include multiple rooms. Each can have a different type.
- Review results — See total paint needed, optimized shopping list, and cost estimate.
How We Calculate
Adjusted Area = Base Area × Surface Factor
Paint Gallons = (Adjusted Area × Coats) ÷ Coverage Rate
Flat: 400 sq ft/gal | Eggshell: 350 sq ft/gal | Primer: 300 sq ft/gal
Surface Factor by Ceiling Type
- • Flat / Smooth: 1.0× (no adjustment)
- • Textured: 1.2× (+20% more paint)
- • Popcorn / Acoustic: 1.4× (+40% more paint)
- • Vaulted (45°): 1.4× (+40% surface area)
- • Cathedral: 1.5× (+50% surface area)
Why Surface Factor Matters
- • Texture: Rough surfaces have more area to cover
- • Absorption: Popcorn ceilings soak up more paint
- • Angles: Vaulted ceilings have larger actual area
- • Access: High ceilings may need more for drips
Example: 12×14 Popcorn Ceiling
- Base Area: 12 × 14 = 168 sq ft
- Surface Factor: 1.4 (popcorn)
- Adjusted Area: 168 × 1.4 = 235 sq ft
- Paint (2 coats): (235 × 2) ÷ 400 = 1.2 gallons
- Buy: 2 gallons (rounded up for touch-ups)
Coverage rates from Paint Quality Institute (PQI) guidelines. Learn more