Formula and Assumptions
Ceiling area = length x width. Gallons = area x coats / coverage.
Actual conditions, local rates, product labels, and contractor recommendations can change the final quantity or cost.
Example Calculation
A 14 by 12 ft room has a 168 sq ft ceiling. Two coats need about 1 gallon.
Tips
- Use flat ceiling paint for most ceilings.
- Patch and prime stains before painting.
- Buy extra for roller loading and edges.
FAQ
Does this include walls?
No, it only estimates ceiling paint.
Do ceilings need two coats?
Many ceilings need one to two coats depending on stains and color.
Should I subtract fixtures?
Small fixtures usually do not affect buying quantity.
What if the ceiling is vaulted?
Measure the actual sloped surface area for a better estimate.