Paint Calculator

Calculate the exact amount of paint needed for your home improvement project. This calculator helps you determine paint quantities for walls, ceilings, and trim, ensuring you buy just the right amount for a professional finish.

Why Use This Paint Calculator?

• Avoid Waste: Purchase only the paint you need, saving money and reducing waste
• Account for Multiple Coats: Calculate requirements for primer and multiple paint layers
• Consider Different Surfaces: Plan for walls, ceilings, trim, and different surface textures
• Include Extra for Touch-ups: Get recommendations for additional paint needed for future touch-ups

How to Use the Calculator

1. Measure Your Space:

   • Measure the length and height of each wall
   • Note down any doors, windows, or other unpaintable areas
   • Measure trim lengths if painting baseboards or crown molding

2. Enter Measurements:

   • Input room dimensions
   • Specify the number of doors and windows
   • Select surface type (smooth or textured)
   • Choose the number of coats needed

3. Review Results:

   • Get paint quantity in gallons/liters
   • See coverage recommendations
   • View additional supplies needed

Understanding Paint Coverage

• One gallon typically covers 350-400 square feet with one coat on smooth surfaces
• Textured or porous surfaces may require 25-50% more paint
• Dark colors covering light ones may need additional coats
• New drywall usually requires primer plus two coats of paint

Tips for Accurate Calculations

1. Surface Preparation:

   • Factor in primer if painting new drywall or making dramatic color changes
   • Consider extra paint for highly textured surfaces
   • Add 10% for touch-ups and future maintenance

2. Paint Selection:

   • Higher quality paints often provide better coverage
   • Consider the sheen - flat paints typically cover more area than glossy finishes
   • Check manufacturer’s specific coverage rates on the paint can

3. Common Pitfalls to Avoid:

   • Don’t forget to subtract for windows and doors
   • Account for multiple coats when needed
   • Consider ceiling height variations
   • Include trim and accent walls in calculations

Frequently Asked Questions

How much extra paint should I buy?

We recommend purchasing 10% extra for touch-ups and to account for any miscalculations or spills.

Do I need primer?

Primer is recommended for:

• New drywall
• Bare wood or metal
• Dramatic color changes
• Covering dark colors
• High-moisture areas

How many coats of paint do I need?

• New surfaces: 1 coat primer + 2 coats paint
• Color changes: 2 coats minimum
• Same color refresh: Often 1 coat is sufficient
• Dark colors: May require 3+ coats

What affects paint coverage?

• Surface texture and porosity
• Paint quality and type
• Application method
• Color changes
• Surface preparation
• Environmental conditions

Technical Notes

• Calculations assume standard ceiling heights and regular wall textures
• Coverage rates are based on manufacturer averages
• Results are estimates; actual paint needed may vary based on application method and conditions
• For best results, always check specific paint manufacturer recommendations