Drywall Sheets Calculator

Enter your total wall and ceiling area and sheet size to estimate how many drywall sheets you need.

Drywall Sheets Calculator

Estimate the number of drywall sheets needed for a room.

This is an estimate for general informational purposes only, not a professional quote. Round up to the next whole sheet, and consider ordering slightly more for rooms with many doors, windows, or corners that create additional cut waste.

Drywall is sold in standard sheet sizes, most commonly 4 feet by 8 feet (32 sq ft per sheet). This calculator divides your total surface area by the sheet size and adds a waste allowance for cuts around doors, windows, and outlets.

Example

  • With the default values shown above, this calculator returns: Sheets Needed ≈ 27.5.

Frequently Asked Questions

What is the standard drywall sheet size?

The most common size is 4 feet by 8 feet (32 square feet), though larger 4×12 ft sheets are also available and can reduce the number of seams in a room.

Should I subtract door and window area?

Many contractors do not bother subtracting small openings since the waste allowance typically covers it, but for rooms with unusually large openings, you may want to subtract that area separately for a more precise estimate.

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