Skip to main content
/
drywallcontractormaterialconstruction
//// Construction · Materials

Drywall Sheet Calculator

Room dimensions → sheets of drywall for walls and ceiling, with waste and tape.

Where this fits

📦 Business & Seller OpsGoing 1099FreelancersFounders

This tool lives inside Going 1099 and is most useful for freelancers and founders.

Corp Tax Rate21%
SE Threshold$400
FICA Cap 2024$168,600

Room Dimensions

Total sheets
21
4×8 sheets
Wall sheets
15
417 sq ft net
Ceiling sheets
6
168 sq ft
Joint tape
126 ft
~3 lb screws
1

Total wall area

wallArea = 2 × (length + width) × height

= 2 × (14 + 12) × 9

= 468 sq ft

2

Door & window deductions

deductions = (doors × 21) + (windows × 15)

= (1 × 21) + (2 × 15)

= −51 sq ft

Standard door = 3×7 ft (21 sq ft); standard window = 3×5 ft (15 sq ft)

3

Net wall area

= 417 sq ft

This is the area that needs drywall after openings

4

Wall sheets (with waste)

sheets = ⌈netArea × (1 + waste%) ÷ 32⌉

= ⌈417 × 1.12 ÷ 32⌉

= 15 sheets

Standard 4×8 sheet = 32 sq ft

5

Ceiling sheets

sheets = ⌈(L × W) × (1 + waste%) ÷ 32⌉

= 6 sheets (168 sq ft)

Key insight

For a room with standard 9 ft ceilings, plan 12% waste minimum. Ceilings waste more — add 15% if you're hanging 12-ft sheets on an irregular ceiling. Count sheets by area, not perimeter.

Use this result in →

🎨Painting Gallons Calculator📐Flooring Underlayment

#ShowYourWork

You might also need

Flooring & Underlayment Calculator

Get flooring box count and underlayment rolls from room dimensions with waste factor.

Try it

Concrete Slab Yardage Calculator

Enter slab dimensions to get cubic yards, cubic feet, and bag count with waste factor.

Try it

Painting Gallons Calculator

Calculate gallons of paint for any room by dimensions, coat count, and coverage rate.

Try it