Calculez vos cloisons en placo.

La plupart des fournisseurs vendent le placo à la verge cube. Pour convertir la surface en verges cubes, utilisez cette formule :

Notre calculatrice multiplie également le résultat par 0 tonnes/vg³ (densité standard) pour estimer le poids.

A drywall calculator starts with wall area: length times height for each wall, summed across the room. It then divides by sheet coverage (32 sq ft for 4x8, 48 sq ft for 4x12) and adds 10% for cutting waste and damaged sheets. But sheets are only one line item. A complete estimate also needs joint compound, screws, and tape, which is where most DIY estimators fall short.

Joint compound math is straightforward once you know the ratio. One 5-gallon bucket covers 400 to 500 square feet of installed drywall through all three coats (tape, fill, finish). Divide your wall area by 450 and round up. Do not buy the small 3.5-quart boxes for anything larger than a patch repair: the per-gallon cost of buckets is roughly 40% lower.

Screw counts follow a fixed pattern. Building code and manufacturer specs call for screws every 12 inches on walls and every 12 inches on ceilings, which works out to 28 to 32 screws per 4x8 sheet. Multiply your sheet count by 30 and add a 5 lb box to your list. Joint tape is the simplest line item: one 250-foot roll covers about 800 square feet of wall, so most single rooms need exactly one roll.

Sheet size selection changes the math meaningfully. A 4x12 sheet covers 48 sq ft versus 32 for a 4x8, so the same 384 sq ft room needs 9 sheets of 4x12 instead of 14 sheets of 4x8 (before waste). Fewer sheets means fewer seams, less mud, and less taping labor. Our drywall calculator lets you toggle between sheet sizes so you can compare the true material count for each option.

Thickness matters for specific applications. Half-inch drywall is the standard for walls in residential construction. Five-eighths inch is required by code for garage ceilings, furnace rooms, and any fire-rated assembly, and it is preferred for all ceilings because it resists sagging between joists. Moisture-resistant board (green or purple) belongs in bathrooms and laundry rooms. The calculator defaults to half-inch pricing; adjust the cost table mentally upward by about 30% for 5/8-inch board.