Drywall Calculator

How to Use This Calculator

Estimate drywall materials accurately for your renovation or new construction project:

1. Measure the total wall and ceiling area in square feet.
2. Select the drywall sheet size you plan to use (4'×8' is most common).
3. Add a waste factor (10-15% for standard rooms, more for complex layouts).
4. Click 'Calculate' to see sheets needed, plus estimates for tape, mud, and screws.

Why This Matters

Drywall comes in large, heavy sheets that are a pain to return, so accurate ordering matters. You need enough sheets plus materials like joint compound (mud), tape, and screws. Running short mid-project is frustrating, but over-ordering means storing or disposing of bulky materials. Getting it right the first time saves money and multiple trips to the store.

• Order the right number of sheets to avoid shortages or waste
• Calculate all associated materials (tape, mud, screws) together
• Plan for proper waste factor based on room complexity
• Estimate costs before starting your project
• Compare costs between different sheet sizes

Worked Examples

Common Mistakes to Avoid

• Not adding waste factor - cuts around windows, doors, and outlets create unusable pieces.
• Forgetting about ceiling drywall if applicable - it adds significantly to material needs.
• Using wrong sheet size for the space - 12' sheets mean fewer joints but are harder to handle.
• Underestimating joint compound needs - you'll need more than you think, especially for beginners.
• Not ordering corner bead for outside corners - an easily forgotten but essential material.