How do I calculate paint for a room?

Calculate wall area: 2 × (length + width) × height. Subtract doors (about 20 sq ft each) and windows (about 15 sq ft each). Divide by paint coverage (350-400 sq ft per gallon). A 12×15 ft room with 8 ft ceilings needs about 1.5 gallons per coat.

How much area does one gallon of paint cover?

One gallon typically covers 350-400 square feet on smooth surfaces. Textured walls reduce coverage to 300-350 sq ft. Primer coverage is about 200-300 sq ft per gallon. The calculator adjusts for surface texture.

How many coats of paint do I need?

Most color changes need 2 coats for even coverage. Dramatic color changes (dark to light or vice versa) may need 3 coats. A primer can reduce the number of topcoats needed. The calculator accounts for multiple coats.

Should I include windows and doors in my calculation?

Yes, subtract them from total wall area. Standard door: 20 sq ft, standard window: 15 sq ft. If you're painting trim, add that area separately. The calculator has fields for doors and windows.

What's the difference between flat, eggshell, and semi-gloss?

Flat paint hides imperfections but is less durable. Eggshell has slight sheen and is easier to clean. Semi-gloss is durable and moisture-resistant, ideal for kitchens and bathrooms. Coverage is similar for all sheens.

How do I calculate ceiling paint?

Multiply length × width for ceiling area. Ceilings typically need flat/matte paint with similar coverage to walls (350-400 sq ft/gallon). Add 10% extra for roller texture and absorption on textured ceilings.

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Frequently Asked Questions

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Paint Calculator

Frequently Asked Questions

01How do I calculate paint for a room?

02How much area does one gallon of paint cover?

03How many coats of paint do I need?

04Should I include windows and doors in my calculation?

05What's the difference between flat, eggshell, and semi-gloss?

06How do I calculate ceiling paint?