What is a paint calculator?

A paint calculator is a free online tool that helps you determine exactly how much paint you need for your painting project. It calculates based on room dimensions, paint type, and number of coats.

How do I use a paint calculator?

Enter your room dimensions (length, width, height), select your paint type, choose the number of coats, and optionally include the ceiling. The calculator will instantly show you how many gallons you need.

How much paint do I need?

The amount of paint you need depends on room size, ceiling height, paint type, and number of coats. A typical 12x12 room with 8-foot ceilings needs 1.5-2 gallons for 2 coats. Use our calculator for exact amounts.

Full Project Calculator

Calculate paint for your entire home, room by room

Paint Options

What type of paint?

How many coats?

I'm painting the ceiling too

Length

Width

Height

# Doors

# Windows

Quick add common rooms:

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