1. What is a Whole House Interior Paint Calculator?

Definition: This calculator estimates the amount of paint needed to cover all interior walls of a house based on total area and paint coverage rate.

Purpose: It helps homeowners and professional painters determine how much paint to purchase for complete interior painting projects.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( A \) — Total area to paint (square feet)
• \( C \) — Paint coverage rate (square feet per gallon)

Explanation: The total area is divided by the paint's coverage rate to determine how many gallons are needed for one coat.

3. Importance of Accurate Paint Calculation

Details: Proper paint estimation ensures you purchase the right amount, avoiding multiple trips to the store and minimizing waste.

4. Using the Calculator

Tips: Enter the total area to be painted in square feet and the paint coverage rate (default 350 sq ft/gallon). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: How do I calculate the area to paint?
A: Measure each wall's length and height, multiply to get area, then sum all walls. Don't subtract windows/doors for simplicity.

Q2: What's a typical coverage rate?
A: Most quality paints cover 300-400 sq ft per gallon. Check your paint can for exact coverage.

Q3: Does this include multiple coats?
A: No, multiply the result by the number of coats needed (typically 2 for good coverage).

Q4: Should I buy extra paint?
A: Yes, purchase 10-20% more than calculated for touch-ups and imperfections.

Q5: Does this include ceilings?
A: No, calculate ceilings separately as they often require different paint.