Intero
Paint Calculator
Paint Calculator
Enter your room dimensions and find out exactly how much paint you need — in gallons or liters, with cost estimates.
Enter your room dimensions above to get your paint estimate.
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Calculate exactly how much paint you need for any room. Enter your room dimensions and get gallons needed, coverage area, and cost estimates. Free and instant.
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Q1 How much paint do I need for a room?
Measure your room length, width, and height. The calculator computes wall area, subtracts doors and windows, multiplies by coats, and tells you how many gallons you need.
Q2 How much does one gallon cover?
One gallon covers about 400 sq ft on smooth, primed walls. Textured surfaces may need more.
Q3 How many coats do I need?
Most rooms need 2 coats. Dark-to-light changes may need 3 coats plus primer.
Q4 Can I visualize paint colors before buying?
Yes — download Intero to upload a room photo and see AI apply different paint colors.
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