Construction
Drywall Sheets Calculator
Drywall sheets from wall area, waste, and sheet size.
Free to use — no sign-up or login.
Sheets (exact)
Sheets to buy
Amortization schedule
| # | Date | Payment | Principal | Extra | Interest | Balance |
|---|---|---|---|---|---|---|
Exact sheets are wall area times (1 + waste percent / 100), divided by sheet area. A 40 ft by 8 ft wall, one wall factor, 10% waste, and 32 ft² sheets is 11.00. Sheets to buy is 11.
Paint volume is the paint estimator. Sheets to buy is the purchase round-up.
Waste is inside the exact count
The waste percent increases the area before the division. Sheets to buy then rounds that exact number up. Openings are still not removed.
Sheet grid
The sketch is a grid of sheets, a picture of the count rather than a scaled wall drawing.
Worked example: 40 ft by 8 ft
Length 40 ft, height 8 ft, walls 1, waste 10%, sheet area 32 ft². Exact sheets 11.00. Sheets to buy 11.
\[ n = 40\times 8\times 1.10 / 32 \]
Frequently asked questions
What does the drywall calculator measure?
The example is exactly 11.00 sheets, so the buy count is also 11.
How many decimal places does drywall calculator show?
The example is exactly 11.00 sheets, so the buy count is also 11. Lengths, areas, volumes, and money use two decimals. Purchase counts are whole numbers.
Does drywall calculator include waste?
Waste percent is included. Doors, windows, and cutoffs beyond that percent are not.
Can drywall calculator mix units?
No. drywall calculator expects every input in the unit printed on its label.
Is drywall calculator a code or structural check?
No. drywall calculator is a quantity estimate. Local rules and site conditions stay outside the formula.
References
Assumptions and limitations
Openings are ignored. Sheets to buy rounds the wasted area up; it is a purchase count.