Roof Sheathing Calculator
Calculate how many 4×8 plywood or OSB sheets you need to sheath a roof.
Enter your values and press Calculate.
How to use the Roof Sheathing calculator
Use H-clips between rafters and leave a 1/8″ gap between sheets for expansion.
Formula
Sheets = roof area ÷ 32 × (1 + waste)
More construction calculators
Square Metre CalculatorArea in m² for any shape, with cost.Square Footage CalculatorArea in square feet for any shape, with cost.Cubic Metre CalculatorVolume in m³ and litres, with cost.Cubic Feet CalculatorVolume in cubic feet, with cost.Multiple Room Area CalculatorTotal floor area of several rooms.Linear Metres & Linear Feet CalculatorTotal length of pieces and cost per metre or foot.Tank Volume CalculatorLitres and gallons in a rectangular or cylindrical tank.Concrete CalculatorConcrete volume and bags for a slab, in metric or imperial.Feet and Inches CalculatorAdd or subtract measurements in feet and inches.Paint CalculatorLitres or gallons of paint for a room.Tile CalculatorHow many tiles you need for a floor or wall.Mulch CalculatorVolume and bags of mulch or bark for a bed.Stair CalculatorRiser height, step count and stringer length.Drywall CalculatorSheets of drywall for walls and ceiling.Wallpaper CalculatorRolls of wallpaper needed for a room.Roof Pitch CalculatorRoof pitch, angle and slope from rise and run.Rafter Length CalculatorRafter length from span, pitch and overhang.Roofing Shingles CalculatorRoofing squares, shingle bundles and drip edge.Fence CalculatorPosts, rails and pickets for a fence.Post Hole Concrete CalculatorConcrete bags to set fence or deck posts.Deck Board CalculatorNumber of deck boards and screws.Deck & Fence Stain CalculatorGallons of stain for a deck or fence.Baluster CalculatorNumber of balusters and spacing for a railing.Paver CalculatorNumber of pavers for a patio or path.Gravel, Sand & Soil CalculatorTonnes and volume of gravel, sand or soil.Cubic Yards CalculatorVolume in cubic yards from dimensions.Sod CalculatorPieces, pallets and rolls of sod for a lawn.Grass Seed CalculatorPounds of grass seed for new or overseeded lawns.Acreage CalculatorAcres and hectares from plot dimensions.Retaining Wall CalculatorBlocks and caps for a retaining wall.Pool Volume CalculatorGallons and litres of water in a pool.Board Foot CalculatorBoard feet of lumber and cost.Check Square CalculatorDiagonal measurement to square a corner or frame.Brick CalculatorNumber of bricks for a wall.Flooring CalculatorBoxes of laminate, vinyl or wood flooring.Scale CalculatorConvert real sizes to scale drawings and models.Concrete Column & Footing CalculatorConcrete for round columns (Sonotubes) and footings.