How To Calculate How Much Paint To Buy For Interior Apr 2026

Most projects require for full coverage and durability, especially when making significant color changes.

To find the area of your walls, you need to measure the dimensions of the room.

Measure the width and height of each opening individually and subtract the exact square footage. Step 3: Account for Multiple Coats how to calculate how much paint to buy for interior

Subtract approximately 20 to 21 square feet per door.

Calculating exactly how much paint to buy prevents unnecessary costs and reduces waste. The general rule of thumb is that with a single coat . Step 1: Calculate Total Wall Surface Area Most projects require for full coverage and durability,

You don't need to paint windows, doors, or large fixtures, so subtract their square footage from your total.

If painting the ceiling, multiply the room's length by its width. Step 2: Subtract "Unpaintable" Areas Step 3: Account for Multiple Coats Subtract approximately

Subtract approximately 15 square feet per window.