Paint Calculator | How Much Paint Do I Need? Free Tool

Room Dimensions & Details

Enter your room measurements to calculate paint requirements

Room Dimensions (feet)

Length

Width

Height

Number of Doors

Number of Windows

Number of Paint Coats

Paint Quality

What are you painting? (Check all that apply)

Walls

Ceiling

Trim & Molding

Doors

Special Conditions (Check if applicable)

Needs primer

Textured walls

Dark to light color

New drywall

Your Paint Estimate

Enter your room dimensions and click "Calculate Paint Needed" to see your personalized paint and materials estimate.

📏 How to Measure Your Room Accurately

Measure length, width, and height in feet
For irregular rooms, break into rectangles
Count all doors and windows
Include closet openings as doors
Measure ceiling height at the highest point
Round up to the nearest half foot

🎨 Paint Coverage Guidelines

Standard Paint: 350-400 sq ft per gallon
Primer Coverage: 300-350 sq ft per gallon
Textured Surfaces: Reduce coverage by 20%
Second Coat: Usually covers 10% more area
High-Quality Paint: Better coverage per gallon
Spray Application: May require 25% more paint

🧰 Essential Painting Supplies

Brushes (angled and straight)
Roller covers (nap appropriate for surface)
Paint trays and liners
Drop cloths and plastic sheeting
Painter's tape (high-quality)
Sandpaper and spackling compound

Pro Tips for Better Results

Always buy more paint than you think you'll need for touch-ups and future maintenance
Higher quality paint may require fewer coats, reducing time and labor costs
Test paint colors on the wall in different lighting conditions before committing to a color
Prime when painting over dark colors, new surfaces, or switching paint types
Use appropriate roller nap: smooth surfaces need 1/4", textured surfaces need 1/2"
Consider the room's lighting and function when choosing paint sheen

📋 Important Notes

These calculations are estimates based on standard coverage rates and room dimensions. Actual paint requirements may vary based on surface texture, paint quality, application method, and number of coats applied. Always purchase additional paint for touch-ups and consider consulting with paint professionals for complex projects.

*All usage of tools, calculators, guides, and resources are at user discretion. West Shore Home does not guarantee the results or data that the tools provide as there are many additional factors that may invalidate results.