Paint Calculator
Calculate how many gallons of paint you need for any room or surface. Accounts for doors, windows, and multiple coats.
Gallons Needed
4
(3.4 exact)
Total Area
586 sq ft
Quarts Needed
14
Estimated Cost
$153
💡 Suggested purchase
4 gallonsWall area: 418 sq ft · Ceiling: 168 sq ft
Frequently Asked Questions
How many square feet does a gallon of paint cover?
One gallon of paint typically covers 350–400 square feet with one coat on a smooth, previously painted surface. Rough or porous surfaces like bare drywall or stucco reduce coverage to 200–300 sq ft per gallon.
How many coats of paint do I need?
Most paint jobs require 2 coats for proper coverage and color accuracy. A single coat can work if you're using the same color or a paint-and-primer combo. Dramatic color changes (light to dark or vice versa) may need 3 coats.
Should I count doors and windows in my paint calculation?
Yes — for planning purposes, subtract doors (typically 20 sq ft each) and windows (15 sq ft each) from your wall area. This gives a more accurate paint estimate and reduces waste.
What's the difference between flat, eggshell, and semi-gloss?
Flat paint hides imperfections best and works well for ceilings and low-traffic walls. Eggshell and satin have a slight sheen and are washable, great for living areas. Semi-gloss and gloss are durable and moisture-resistant, ideal for kitchens, bathrooms, and trim.