Door Area Calculator
Calculate total door area from width, height, and door count, with quick presets for standard interior, standard exterior, and double door sizes.
Quick Presets
in
in
Total Door Area
20.00 sq ft
Area per Door
20.00 sq ft
How to Use the Door Area Calculator
Enter a door's width and height, or tap a common preset size (standard interior, standard exterior, or double door) to fill them in instantly, then enter how many doors you have. The calculator converts each door's dimensions to square feet and multiplies by the door count to give a total area — useful for estimating paint, primer, or other material coverage across every door in a project.
Area per Door (sq ft) = (Width in × Height in) ÷ 144
Total Area = Area per Door × Number of Doors
Total Area = Area per Door × Number of Doors
Example
A standard 36" × 80" exterior door has an area of (36 × 80) ÷ 144 = 20 sq ft. Painting 3 such doors requires covering a total of 60 sq ft across all three.
Common Use Cases
- Estimating how much paint or primer is needed to cover one or more doors.
- Figuring out total door area for a replacement or refinishing quote.
- Quickly using a standard door size preset instead of measuring a door you already know the type of.
FAQs
- How is this different from the Window Area Calculator? The Window Area Calculator applies the same simple width-by-height math to windows instead of doors. This tool is specifically built for doors, and adds common door-size presets (standard interior, standard exterior, double door) as a convenience so you don't need to measure a door you already know the standard type of.
- Do the presets match every door exactly? Presets reflect common standard sizes, but actual doors can vary by manufacturer, region, or custom order. Always measure your actual door when precision matters, and use the presets mainly as a fast starting point or estimate.
- Should I measure the door slab only, or include the frame? For paint or material coverage, measure the door slab itself (the moving panel), not the surrounding frame or trim, since that's the surface actually being covered.