Key takeaways
- One gallon often covers about 350 square feet
- Plan for two coats
- Subtract doors and windows
- Use the Gallon Calculator tool
Buying too little paint means a trip back to the store and a color mismatch risk. Buying too much wastes money. A quick estimate helps.
The method
- Measure the length of each wall and multiply by the height
- Add the walls together
- Subtract about 20 square feet for a door and 15 for a window
- Divide by about 350, the usual coverage of a gallon
- Multiply by two for two coats
Our Gallon Calculator does the math for you and includes a small cushion for touch-ups.
Related services
Questions about your own space? Call or text 800-224-9245, or use the quote form below.