Drywall is one of the most common building materials in residential construction across Ontario. Whether you're finishing a basement, renovating a kitchen, or building an addition, knowing exactly how many sheets you need prevents unnecessary trips to the supply store and reduces job-site waste.

Standard 4'×8' sheets work for most rooms with 8-foot ceilings. For rooms with 9 or 10-foot ceilings, consider 4'×12' sheets — they create fewer seams and result in a cleaner finish, though they're heavier and harder to handle. Most professional drywall contractors in the GTA charge $1.50–$3.00 per square foot for installation and finishing, on top of material costs.

Joint compound (mud), tape, and screws are often overlooked when budgeting. A typical room requires about 1 box of pre-mixed compound and 1 roll of tape per 480 square feet of drywall. Using our calculator helps you plan all materials in a single order.

Frequently Asked Questions

How many sheets of drywall do I need?

Measure the total wall and ceiling area in square feet, subtract openings for doors and windows, then divide by the sheet size (32 sq ft for 4×8 sheets, or 48 sq ft for 4×12 sheets). Add 10% for waste and cuts. Our drywall calculator above handles this automatically, including material estimates for mud, tape, and screws.

How much joint compound do I need per sheet of drywall?

Plan for approximately 1 box (approximately 17L) of pre-mixed joint compound per 460–480 square feet of drywall — roughly 15 standard 4×8 sheets. This covers three coats: taping, filling, and finishing. Actual usage varies with joint density and corner count. Our drywall mud calculator above estimates compound quantities based on your room dimensions.

How much does drywall installation cost per square foot in Toronto?

Drywall installation and finishing in the GTA typically costs $1.50–$3.00 per square foot for labour, depending on finish level and project complexity. Level 4 finish runs $1.50–$2.00/sq ft, while Level 5 premium finish runs $2.50–$3.00/sq ft. Materials (boards, compound, tape, screws) add approximately $0.80–$1.50 per square foot on top of labour.

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