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Paint Coverage Calculator

Never buy too little or too much paint again. Accurate calculations save time and money.

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About the Paint Coverage Calculator

Never buy too little or too much paint again. Accurate calculations save time and money.

Calculate how much paint you need for any room based on dimensions and coats. This calculator is completely free β€” no sign-up, no email, no paywalls. Results are estimates; always verify with a qualified professional for high-stakes decisions.

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Frequently Asked Questions

How many sq ft does a gallon of paint cover?
Most paint covers 350–400 sq ft per gallon. Premium paint or textured surfaces may cover less. Rough brick or unprepared walls may need 200–300 sq ft/gallon.
Do I need a primer?
Yes if: painting over dark colors, new drywall, stained surfaces, or changing to a dramatically different color. Primer improves coverage and often saves paint coats.
How many coats of paint do I need?
Usually 2 coats. If going from dark to light, 3 may be needed. High-quality paints sometimes achieve good coverage in 1 coat.
How much does interior painting cost?
DIY: just materials ($50–$200/room). Professionally: $300–$800 per room depending on size, prep needed, and your location.

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πŸ“‹ How to Use

  1. Enter your values in the fields above
  2. Click Calculate or press Enter
  3. View your instant results and chart
  4. Export to CSV or share your results

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