Paint Calculator

Paint Estimation for Contractors

Accurate paint estimation prevents costly over-ordering and embarrassing callbacks for additional material. The fundamental formula is straightforward: calculate total wall area, subtract openings (doors, windows), multiply by the number of coats, and divide by the paint coverage rate.

Coverage Factors to Consider

• Surface texture: Smooth drywall covers at 350-400 sq ft/gal, while textured walls drop to 200-300 sq ft/gal.
• Color change: Going from dark to light (or vice versa) may require 3 coats or a tinted primer.
• Paint quality: Premium paints generally offer better coverage and hide than budget options.
• Application method: Spray application uses 20-30% more paint than roller application.

Exam Relevance

Material estimation questions appear on the Florida General Contractor exam under Project Management and Contract Administration. While paint-specific questions are less common than concrete or lumber, the underlying skill of calculating area, subtracting openings, and applying coverage rates is tested across multiple material types. Mastering this formula pattern helps with all material estimation problems.