Question 1

How much paint do I need for a room?

Accepted Answer

Calculate net wall area after doors and windows, multiply by coats, divide by paint coverage, and add a wastage buffer.

Question 2

Should I subtract doors and windows?

Accepted Answer

Yes. Subtracting cutouts gives a more realistic paint estimate and avoids overbuying.

Question 3

Why add a paint wastage buffer?

Accepted Answer

A 5% to 10% buffer helps cover roller absorption, surface texture, touch-ups, and small measurement errors.

Question 4

Does primer use the same coverage?

Accepted Answer

Primer coverage can differ by product and wall condition. Use the product label coverage for best estimates.