Paint Calculator — How Many Gallons of Paint Do I Need?

Paint Calculator — How Many Gallons of Paint Do I Need?

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.

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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