Free Paint Calculator. Enter room dimensions and number of coats to calculate exactly how many gallons of paint you need and the estimated cost.
🎨 Paint Calculator
💡 Pro Tip
Buy 10–15% extra paint to ensure color consistency for touch-ups. Paint mixed in different batches can have slight color variations.
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Frequently Asked Questions
Q: How many gallons of paint do I need for a room?
One gallon of paint covers approximately 350–400 square feet with one coat. A standard 12x12 room with 8-foot ceilings needs roughly 1.5 gallons for two coats.
Q: How much does a gallon of paint cost?
Interior paint typically costs $20–$80 per gallon depending on brand and quality. Premium paints run $60–$100+ per gallon.
Q: Should I apply one coat or two coats of paint?
Two coats are recommended for a smooth, even, and durable finish. One coat may be sufficient if painting over a similar color with high-coverage paint.

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