Interior Paint Calculator
Estimate paint for your entire home. Add multiple rooms, get finish recommendations for each, and see a combined shopping list with cost breakdown.
Last updated: February 15, 2026
Room Setup
Rooms (1)
Room 1: Bedroom
Recommended: Eggshell — Eggshell is ideal — slight sheen, easy to clean
Project Summary
Total Paint
2 gal
Total Area
339 sq ft
Est. Cost
$748
Room Breakdown
Bedroom2 gal
339 sq ft · Eggshell
Shopping List
Paint:2 × 1-gallon can
Cost Estimate
Paint:$70
Labor:$678
TOTAL:$748
*Estimate only. Actual costs vary by location, brand, and contractor.
Pro Tips
- • Buy all paint for the same room from one batch for consistent color
- • Start with ceilings, then walls, then trim — top to bottom
- • Keep 1 extra quart per color for future touch-ups
How to Use This Calculator
- Set global options — Choose paint quality, number of coats, and waste percentage. These apply to all rooms.
- Pick a room type — Select Bedroom, Bathroom, Kitchen, etc. The calculator auto-fills typical dimensions and recommends the best paint finish.
- Adjust dimensions — Fine-tune length, width, height, doors, and windows for each room. Check "Include ceiling" or "Accent wall" if needed.
- Add more rooms — Click "Add Room" to include every room in your project. Each room gets its own finish recommendation.
- Review the project summary — See per-room breakdown, combined shopping list, and total cost estimate — everything in one place.
How We Calculate
Per Room: Gallons = (Net Area × (1 + Waste%)) ÷ Coverage × Coats
Project Total = Sum of all room gallons | Standard door: 21 sq ft | Window: 12 sq ft
Recommended Finish by Room
- • Bedroom: Eggshell (375 sq ft/gal)
- • Living Room: Eggshell (375 sq ft/gal)
- • Kitchen: Satin (375 sq ft/gal)
- • Bathroom: Semi-Gloss (350 sq ft/gal)
- • Hallway: Satin (375 sq ft/gal)
Why Different Finishes?
- • Moisture: Bathrooms need semi-gloss to resist mildew
- • Durability: Kitchens and hallways get more wear
- • Appearance: Bedrooms look best with subtle sheen
- • Cleaning: Higher sheen = easier to wipe clean
- • Cost: Higher sheen costs slightly more per gallon
Example: 3-Bedroom Home
- Bedroom 1 (12×12): 339 sq ft → 2 gal eggshell
- Bedroom 2 (10×10): 267 sq ft → 2 gal eggshell
- Bathroom (5×8): 163 sq ft → 1 gal semi-gloss
- Kitchen (12×14): 373 sq ft → 2 gal satin
- Living Room (16×20): 533 sq ft → 4 gal eggshell
- Project Total: 11 gallons (2 coats, 10% waste)
Coverage rates from Paint Quality Institute (PQI) guidelines. Learn more