Exterior Paint Calculator

Estimate exterior paint requirements for your home or building. This calculator accounts for surface texture, siding type, number of coats, and trim areas.

Exterior Paint Calculator

Calculate exactly how much paint and primer you need

Project Details

Measure: (Perimeter × Height) + gables + soffits. Many pros don't subtract doors/windows.

Non-porous, smooth surface. Best coverage rates.

Note: Exterior projects almost always require 2 coats for proper weather protection

Always required for bare wood, masonry, and metal. Can be skipped on previously painted surfaces in good condition with same/darker colors.

Ready to Calculate

Enter your project details and click
"Calculate Paint Needed" to see results

Based on professional industry standards from PCA (Painting Contractors Association) and MPI (Master Painters Institute). Calculations account for surface porosity, texture, and application method.

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Want to Learn More?

Coverage rates for siding, trim, and doors with PDCA standards and surface preparation requirements.

Read the Exterior Paint Coverage Guide

How to Use This Calculator

  1. Measure exterior walls: Calculate total wall square footage.
  2. Select surface type: Choose smooth siding, textured stucco, or rough wood.
  3. Add trim and details: Include doors, windows, fascia, and trim.
  4. Number of coats: Most exterior projects require 2 coats.

Exterior Paint Coverage

One gallon covers 250-400 sq ft depending on texture. Smooth surfaces have best coverage, rough stucco may require 30% more paint.