Whole House Interior Paint Calculator

Paint Calculation Formula:

\[ \text{Paint (gallons)} = \frac{A_{\text{total interior}}}{C} \times N \]

Total Interior Area (A_{total interior}):

square feet

Coverage per Gallon (C):

square feet per gallon

Number of Coats (N):

coats

Paint Required:

1. What is the Whole House Interior Paint Calculator?

The Whole House Interior Paint Calculator estimates the amount of paint needed to paint the entire interior of a house based on total interior area, paint coverage per gallon, and number of coats required.

2. How Does the Calculator Work?

The calculator uses the paint calculation formula:

\[ \text{Paint (gallons)} = \frac{A_{\text{total interior}}}{C} \times N \]

Where:

\( A_{\text{total interior}} \) — Total interior wall and ceiling area in square feet
\( C \) — Paint coverage per gallon in square feet
\( N \) — Number of coats required

Explanation: The formula calculates the total paint needed by dividing the total area by the coverage per gallon and multiplying by the number of coats for complete coverage.

3. Importance of Accurate Paint Calculation

Details: Accurate paint calculation helps avoid wastage, ensures you purchase the right amount of paint, and helps with budget planning for your painting project.

4. Using the Calculator

Tips: Measure all interior walls and ceilings accurately. Standard paint coverage is typically 350-400 square feet per gallon. Most interior painting requires 2 coats for optimal coverage.

5. Frequently Asked Questions (FAQ)

Q1: How do I calculate total interior area?
A: Measure length and height of each wall, calculate area (length × height), and sum all wall areas plus ceiling area.

Q2: What is typical paint coverage per gallon?
A: Most quality interior paints cover 350-400 square feet per gallon. Check the manufacturer's specifications for exact coverage.

Q3: Why are multiple coats usually needed?
A: Multiple coats ensure even color, better coverage, and longer-lasting results, especially when changing from dark to light colors.

Q4: Should I buy extra paint for touch-ups?
A: Yes, it's recommended to purchase 10-15% extra paint for touch-ups and future repairs.

Q5: Does this include trim and doors?
A: This calculator focuses on main wall areas. Trim, doors, and cabinets require separate calculation as they have different coverage rates.