Cost Formula:
The Painting Cost Calculator estimates the total expense for painting the interior of a house by calculating both material costs (paint) and labor costs based on the area to be painted.
The calculator uses the cost formula:
Where:
Explanation: The formula calculates material cost by determining how many gallons of paint are needed and multiplying by the price per gallon, then adds labor cost based on the total area.
Details: Accurate cost estimation helps in budgeting for home improvement projects, comparing contractor quotes, and planning expenses for DIY painting projects.
Tips: Measure the total paintable area accurately, check paint can labels for coverage rates, research current paint prices, and get labor quotes from local painters for realistic estimates.
Q1: How do I calculate the total paintable area?
A: Measure wall lengths and heights, then subtract areas for windows and doors. Typically, calculate: (Wall length × Height) - (Window/Door areas).
Q2: What is a typical paint coverage rate?
A: Most quality paints cover 300-400 square feet per gallon. Check the specific product label as coverage varies by paint type and surface.
Q3: How much does interior painting labor typically cost?
A: Labor costs range from $1-3 per square foot depending on location, complexity, and whether trim/ceilings are included.
Q4: Should I include primer in the cost calculation?
A: Yes, if walls need priming. Calculate primer separately using the same formula but with primer coverage rates and prices.
Q5: How many coats of paint are typically needed?
A: Most projects require 2 coats for even coverage. Multiply your paint quantity by 2 when calculating material costs.