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Calcimator

Paint Calculator

Calculate how many gallons of paint you need for a room. Accounts for doors, windows, and multiple coats.

Inputs

ft
ft
ft

Results

Gallons Needed

3

Exact Gallons2.24
Paintable Area392 sq ft
Total Wall Area432 sq ft
Estimated Cost$120

Gallons Needed

3

How to Use This Calculator
  1. Start by filling in the input fields below. Results update instantly as you type, so you can experiment with different values to see how they affect the outcome.
  2. Room Length — Length of the room in feet. Accepts values from 1 ft to 200 ft (default: 15 ft).
  3. Room Width — Width of the room in feet. Accepts values from 1 ft to 200 ft (default: 12 ft).
  4. Wall Height — Height of the walls in feet. Accepts values from 4 ft to 30 ft (default: 8 ft).
  5. Number of Coats — How many coats of paint to apply. Accepts values from 1 to 5 (default: 2).
  6. Expand "Advanced Options" for additional fine-tuning. These optional inputs let you model more specific scenarios:
  7. Doors & Windows — Number of doors/windows to subtract (~20 sq ft each). Accepts values from 0 to 20 (default: 2).
  8. Cost per Gallon — enter a dollar amount. Accepts values from $10 to $200 (default: $40).
  9. Once all inputs are set, review your results in the Results panel. Here's what each output means:
  10. Gallons Needed — shown as a numeric value. This is the primary result of this calculator.
  11. Exact Gallons — shown as a numeric value.
  12. Paintable Area — shown as a numeric value.
  13. Total Wall Area — shown as a numeric value.
  14. Estimated Cost — shown as a dollar amount.
  15. Explore the related calculators below if you need deeper analysis or want to approach this topic from a different angle.
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