How to Estimate Paint for Your Interior Project
A fresh coat of paint is the most cost-effective way to transform a space. But estimating the right amount can be tricky—buy too little and you're scrambling to match batches; buy too much and you're storing cans forever.
The Professional Method
To calculate the paintable area of a room, use this method:
- Measure Perimeter: Add the lengths of all walls together.
- Calculate Wall Area: Multiply the perimeter by the ceiling height.
- Subtract Openings: Deduct area for doors (21 sq ft) and windows (15 sq ft).
A standard gallon typically covers 350 to 400 square feet. For a professional finish, two coats are recommended.
Quality Control & Reporting
For large-scale developments, paint sub-contractors use **Space Capture** to document room readiness, verify color specifications, and log completion for faster progress payments.