[{"data":1,"prerenderedAt":668},["ShallowReactive",2],{"catalog":3,"page:\u002Fwoodworking\u002Fplywood-calculator":294},[4,55,76,108,129,165,197,247,280],{"path":5,"stem":6,"title":7,"short":8,"icon":9,"order":10,"calculators":11},"\u002Fwoodworking","woodworking\u002Findex","Woodworking Calculators","Board feet, stairs, deck boards, tape measure fractions and decimals.","i-lucide-hammer",1,[12,19,25,31,37,43,49],{"path":13,"stem":14,"title":15,"short":16,"icon":17,"hub":18},"\u002Fwoodworking\u002Fboard-foot-calculator","woodworking\u002Fboard-foot-calculator","Board Foot Calculator","Board feet, cost and waste for a list of boards, hardwood or softwood.","i-lucide-ruler-dimension-line","woodworking",{"path":20,"stem":21,"title":22,"short":23,"icon":24,"hub":18},"\u002Fwoodworking\u002Fdeck-board-calculator","woodworking\u002Fdeck-board-calculator","Deck Board Calculator","Deck boards, linear feet, joists and screws for any deck size.","i-lucide-rows-3",{"path":26,"stem":27,"title":28,"short":29,"icon":30,"hub":18},"\u002Fwoodworking\u002Ffraction-to-decimal-chart","woodworking\u002Ffraction-to-decimal-chart","Fraction to Decimal Chart (Inches)","Every 64th of an inch as a decimal and in mm, with a two-way converter.","i-lucide-decimals-arrow-right",{"path":32,"stem":33,"title":34,"short":35,"icon":36,"hub":18},"\u002Fwoodworking\u002Fhow-to-read-a-tape-measure","woodworking\u002Fhow-to-read-a-tape-measure","How to Read a Tape Measure","Tap any mark on an interactive tape to see its fraction, decimal and mm.","i-lucide-pencil-ruler",{"path":38,"stem":39,"title":40,"short":41,"icon":42,"hub":18},"\u002Fwoodworking\u002Fplywood-calculator","woodworking\u002Fplywood-calculator","Plywood Calculator","Plywood and OSB sheets for subfloors, walls and roofs, with cost.","i-lucide-layers",{"path":44,"stem":45,"title":46,"short":47,"icon":48,"hub":18},"\u002Fwoodworking\u002Frafter-calculator","woodworking\u002Frafter-calculator","Rafter Calculator","Common rafter length, angle and ridge height for any span and pitch.","i-lucide-house",{"path":50,"stem":51,"title":52,"short":53,"icon":54,"hub":18},"\u002Fwoodworking\u002Fstair-calculator","woodworking\u002Fstair-calculator","Stair Calculator","Risers, treads, total run and stringer length from the total rise.","i-lucide-chart-no-axes-column-increasing",{"path":56,"stem":57,"title":58,"short":59,"icon":60,"order":61,"calculators":62},"\u002Fresin-and-candles","resin-and-candles\u002Findex","Resin & Candle Making Calculators","Epoxy volumes and mix ratios, candle wax and fragrance oil.","i-lucide-flask-conical",2,[63,70],{"path":64,"stem":65,"title":66,"short":67,"icon":68,"hub":69},"\u002Fresin-and-candles\u002Fcandle-wax-calculator","resin-and-candles\u002Fcandle-wax-calculator","Candle Wax Calculator","Wax and fragrance oil by weight for any jar size and batch.","i-lucide-flame","resin-and-candles",{"path":71,"stem":72,"title":73,"short":74,"icon":75,"hub":69},"\u002Fresin-and-candles\u002Fepoxy-resin-calculator","resin-and-candles\u002Fepoxy-resin-calculator","Epoxy Resin Calculator","Resin for molds, river tables and tabletop coats, split into A and B.","i-lucide-droplets",{"path":77,"stem":78,"title":79,"short":80,"icon":81,"order":82,"calculators":83},"\u002Fquilting","quilting\u002Findex","Quilting Calculators","Backing, binding, half-square triangles and quilt sizes.","i-lucide-grid-3x3",3,[84,91,96,102],{"path":85,"stem":86,"title":87,"short":88,"icon":89,"hub":90},"\u002Fquilting\u002Fhalf-square-triangle-calculator","quilting\u002Fhalf-square-triangle-calculator","Half Square Triangle Calculator","Cutting sizes and square counts for 2-, 4- and 8-at-a-time HSTs.","i-lucide-triangle-right","quilting",{"path":92,"stem":93,"title":94,"short":95,"icon":42,"hub":90},"\u002Fquilting\u002Fquilt-backing-calculator","quilting\u002Fquilt-backing-calculator","Quilt Backing Calculator","Yardage, panels and seam direction for any quilt back.",{"path":97,"stem":98,"title":99,"short":100,"icon":101,"hub":90},"\u002Fquilting\u002Fquilt-binding-calculator","quilting\u002Fquilt-binding-calculator","Quilt Binding Calculator","Strips to cut and fabric to buy for double-fold binding.","i-lucide-frame",{"path":103,"stem":104,"title":105,"short":106,"icon":107,"hub":90},"\u002Fquilting\u002Fquilt-size-calculator","quilting\u002Fquilt-size-calculator","Quilt Size Calculator","Finished size from blocks and borders, or the right size for your bed.","i-lucide-bed-double",{"path":109,"stem":110,"title":111,"short":112,"icon":113,"order":114,"calculators":115},"\u002Fsewing-and-needlework","sewing-and-needlework\u002Findex","Sewing & Needlework Calculators","Fabric yardage, cutting plans and cross stitch fabric sizes.","i-lucide-scissors",4,[116,123],{"path":117,"stem":118,"title":119,"short":120,"icon":121,"hub":122},"\u002Fsewing-and-needlework\u002Fcross-stitch-fabric-calculator","sewing-and-needlework\u002Fcross-stitch-fabric-calculator","Cross Stitch Fabric Calculator","Finished design size and fabric to cut for any Aida or linen count.","i-lucide-grid-2x2-x","sewing-and-needlework",{"path":124,"stem":125,"title":126,"short":127,"icon":128,"hub":122},"\u002Fsewing-and-needlework\u002Ffabric-yardage-calculator","sewing-and-needlework\u002Ffabric-yardage-calculator","Fabric Yardage Calculator","Yards and meters to buy for any set of pieces, with a cutting plan.","i-lucide-ruler",{"path":130,"stem":131,"title":132,"short":133,"icon":134,"order":135,"calculators":136},"\u002Fknitting-and-crochet","knitting-and-crochet\u002Findex","Knitting & Crochet Calculators","Yarn yardage, gauge, blanket sizes, and needle and hook sizes.","i-lucide-spool",5,[137,143,149,154,159],{"path":138,"stem":139,"title":140,"short":141,"icon":107,"hub":142},"\u002Fknitting-and-crochet\u002Fcrochet-blanket-size-calculator","knitting-and-crochet\u002Fcrochet-blanket-size-calculator","Crochet Blanket Size Calculator","Blanket size chart plus the starting chain and rows at your gauge.","knitting-and-crochet",{"path":144,"stem":145,"title":146,"short":147,"icon":148,"hub":142},"\u002Fknitting-and-crochet\u002Fcrochet-hook-size-chart","knitting-and-crochet\u002Fcrochet-hook-size-chart","Crochet Hook Size Chart","US letters, millimeters and UK sizes for every hook, plus the yarn each suits.","i-lucide-fishing-hook",{"path":150,"stem":151,"title":152,"short":153,"icon":128,"hub":142},"\u002Fknitting-and-crochet\u002Fknitting-gauge-calculator","knitting-and-crochet\u002Fknitting-gauge-calculator","Knitting Gauge Calculator","Cast-on stitches and rows from your gauge, or rescale a pattern.",{"path":155,"stem":156,"title":157,"short":158,"icon":36,"hub":142},"\u002Fknitting-and-crochet\u002Fknitting-needle-size-chart","knitting-and-crochet\u002Fknitting-needle-size-chart","Knitting Needle Size Chart","US, metric and UK sizes for every knitting needle, plus the yarn each suits.",{"path":160,"stem":161,"title":162,"short":163,"icon":164,"hub":142},"\u002Fknitting-and-crochet\u002Fyarn-calculator","knitting-and-crochet\u002Fyarn-calculator","Yarn Calculator","Yards, meters and skeins for any project, worked out from your swatch.","i-lucide-scale",{"path":166,"stem":167,"title":168,"short":169,"icon":170,"order":171,"calculators":172},"\u002Fpool-and-aquarium","pool-and-aquarium\u002Findex","Pool, Pond & Aquarium Calculators","Pool and pond gallons, aquarium volume and fish stocking.","i-lucide-waves",6,[173,180,186,191],{"path":174,"stem":175,"title":176,"short":177,"icon":178,"hub":179},"\u002Fpool-and-aquarium\u002Faquarium-volume-calculator","pool-and-aquarium\u002Faquarium-volume-calculator","Aquarium Volume Calculator","Gallons, liters and weight for rectangle, bow front, cylinder and hex tanks.","i-lucide-container","pool-and-aquarium",{"path":181,"stem":182,"title":183,"short":184,"icon":185,"hub":179},"\u002Fpool-and-aquarium\u002Ffish-tank-stocking-calculator","pool-and-aquarium\u002Ffish-tank-stocking-calculator","Fish Tank Stocking Calculator","Check your fish list against the inch-per-gallon and surface-area rules.","i-lucide-fish",{"path":187,"stem":188,"title":189,"short":190,"icon":75,"hub":179},"\u002Fpool-and-aquarium\u002Fpond-volume-calculator","pool-and-aquarium\u002Fpond-volume-calculator","Pond Volume Calculator","Pond gallons, liner size and pump flow for any garden pond.",{"path":192,"stem":193,"title":194,"short":195,"icon":196,"hub":179},"\u002Fpool-and-aquarium\u002Fpool-volume-calculator","pool-and-aquarium\u002Fpool-volume-calculator","Pool Volume Calculator","Gallons and liters for round, oval, rectangle and kidney pools.","i-lucide-waves-ladder",{"path":198,"stem":199,"title":200,"short":201,"icon":202,"order":203,"calculators":204},"\u002Fgarden","garden\u002Findex","Garden & Landscape Calculators","Mulch, gravel, soil and sand, companion plants and garden plans.","i-lucide-leaf",7,[205,212,218,224,230,236,242],{"path":206,"stem":207,"title":208,"short":209,"icon":210,"hub":211},"\u002Fgarden\u002Fcompanion-planting-chart","garden\u002Fcompanion-planting-chart","Companion Planting Chart","Good and bad neighbors for 30 vegetables, herbs and flowers.","i-lucide-sprout","garden",{"path":213,"stem":214,"title":215,"short":216,"icon":217,"hub":211},"\u002Fgarden\u002Fgravel-calculator","garden\u002Fgravel-calculator","Gravel Calculator","Gravel for driveways, paths and patios in cubic yards, tons and bags.","i-lucide-mountain",{"path":219,"stem":220,"title":221,"short":222,"icon":223,"hub":211},"\u002Fgarden\u002Fmulch-calculator","garden\u002Fmulch-calculator","Mulch Calculator","Mulch for garden beds in cubic yards and 1.5, 2 or 3 cu ft bags.","i-lucide-trees",{"path":225,"stem":226,"title":227,"short":228,"icon":229,"hub":211},"\u002Fgarden\u002Fraised-bed-soil-calculator","garden\u002Fraised-bed-soil-calculator","Raised Bed Soil Calculator","Soil for any raised bed in cubic feet, cubic yards and bags.","i-lucide-shovel",{"path":231,"stem":232,"title":233,"short":234,"icon":235,"hub":211},"\u002Fgarden\u002Fsand-calculator","garden\u002Fsand-calculator","Sand Calculator","Sand for sandboxes, paver bases and leveling in tons and bags.","i-lucide-hourglass",{"path":237,"stem":238,"title":239,"short":240,"icon":241,"hub":211},"\u002Fgarden\u002Fsquare-foot-garden-planner","garden\u002Fsquare-foot-garden-planner","Square Foot Garden Planner","Plan a square foot garden square by square and count the plants.","i-lucide-layout-grid",{"path":243,"stem":244,"title":245,"short":246,"icon":210,"hub":211},"\u002Fgarden\u002Ftopsoil-calculator","garden\u002Ftopsoil-calculator","Topsoil Calculator","Topsoil for lawns, beds and leveling in cubic yards, tons and bags.",{"path":248,"stem":249,"title":250,"short":251,"icon":252,"order":253,"calculators":254},"\u002Fpets","pets\u002Findex","Pet & Backyard Animal Calculators","Cat and dog ages, puppy adult weight, and chicken coop space.","i-lucide-paw-print",8,[255,262,268,274],{"path":256,"stem":257,"title":258,"short":259,"icon":260,"hub":261},"\u002Fpets\u002Fcat-age-calculator","pets\u002Fcat-age-calculator","Cat Age Calculator","Cat years to human years, plus your cat's life stage.","i-lucide-cat","pets",{"path":263,"stem":264,"title":265,"short":266,"icon":267,"hub":261},"\u002Fpets\u002Fchicken-coop-size-calculator","pets\u002Fchicken-coop-size-calculator","Chicken Coop Size Calculator","Coop floor, run, roosts, nest boxes and vents for your flock.","i-lucide-egg",{"path":269,"stem":270,"title":271,"short":272,"icon":273,"hub":261},"\u002Fpets\u002Fdog-age-calculator","pets\u002Fdog-age-calculator","Dog Age Calculator","Dog years to human years by size, plus the epigenetic formula.","i-lucide-dog",{"path":275,"stem":276,"title":277,"short":278,"icon":279,"hub":261},"\u002Fpets\u002Fpuppy-weight-calculator","pets\u002Fpuppy-weight-calculator","Puppy Weight Calculator","Your puppy's likely adult weight, from its weight and age in weeks.","i-lucide-bone",{"path":281,"stem":282,"title":283,"short":284,"icon":285,"order":286,"calculators":287},"\u002Fhome-improvement","home-improvement\u002Findex","Home Improvement Calculators","Tile, boxes and grout for floors, walls and backsplashes.","i-lucide-paint-roller",9,[288],{"path":289,"stem":290,"title":291,"short":292,"icon":81,"hub":293},"\u002Fhome-improvement\u002Ftile-calculator","home-improvement\u002Ftile-calculator","Tile Calculator","Tiles, boxes and grout for floors, walls and backsplashes.","home-improvement",{"kind":295,"calculator":296},"calculator",{"id":297,"title":40,"body":298,"calculator":634,"description":635,"extension":636,"faq":637,"hub":18,"icon":42,"keyword":656,"meta":657,"navigation":658,"path":38,"related":659,"seo":664,"seoTitle":665,"short":41,"stem":39,"updated":666,"__hash__":667},"calculators\u002Fwoodworking\u002Fplywood-calculator.md",{"type":299,"value":300,"toc":625},"minimark",[301,306,310,345,349,352,468,471,476,548,552,555,589,593],[302,303,305],"h2",{"id":304},"how-the-calculator-works","How the calculator works",[307,308,309],"p",{},"Choose what you are covering, enter its size, then pick the sheet size.",[311,312,313,321,327,333,339],"ul",{},[314,315,316,320],"li",{},[317,318,319],"strong",{},"Floor, subfloor or ceiling:"," length × width.",[314,322,323,326],{},[317,324,325],{},"Walls:"," the total length of the walls end to end × the wall height, less the area of doors and windows if you will not sheathe over them.",[314,328,329,332],{},[317,330,331],{},"Gable roof:"," length × width of the footprint, overhangs included, × the slope factor √(1 + (pitch ÷ 12)²), which turns the level footprint into the sloped area of both sides.",[314,334,335,338],{},[317,336,337],{},"Sheets:"," area ÷ sheet area, plus waste (10% by default), rounded up.",[314,340,341,344],{},[317,342,343],{},"Full-sheet layout:"," for floors, the calculator also counts whole sheets laid in a grid with no offcuts reused, the most a simple rectangular floor should take.",[302,346,348],{"id":347},"plywood-sheet-chart","Plywood sheet chart",[307,350,351],{},"4 × 8 ft sheets (32 square feet each) for common floor sizes.",[353,354,355,374],"table",{},[356,357,358],"thead",{},[359,360,361,365,368,371],"tr",{},[362,363,364],"th",{},"Floor",[362,366,367],{},"Exact sheets",[362,369,370],{},"With 10% waste",[362,372,373],{},"Full-sheet grid",[375,376,377,391,405,417,429,442,455],"tbody",{},[359,378,379,383,386,389],{},[380,381,382],"td",{},"8 × 10 ft (80 sq ft)",[380,384,385],{},"2.5",[380,387,388],{},"3",[380,390,388],{},[359,392,393,396,399,402],{},[380,394,395],{},"10 × 12 ft (120 sq ft)",[380,397,398],{},"3.75",[380,400,401],{},"5",[380,403,404],{},"6",[359,406,407,410,413,415],{},[380,408,409],{},"12 × 12 ft (144 sq ft)",[380,411,412],{},"4.5",[380,414,401],{},[380,416,404],{},[359,418,419,422,424,427],{},[380,420,421],{},"12 × 16 ft (192 sq ft)",[380,423,404],{},[380,425,426],{},"7",[380,428,404],{},[359,430,431,434,437,440],{},[380,432,433],{},"16 × 20 ft (320 sq ft)",[380,435,436],{},"10",[380,438,439],{},"11",[380,441,436],{},[359,443,444,447,450,453],{},[380,445,446],{},"20 × 24 ft (480 sq ft)",[380,448,449],{},"15",[380,451,452],{},"17",[380,454,449],{},[359,456,457,460,463,466],{},[380,458,459],{},"24 × 24 ft (576 sq ft)",[380,461,462],{},"18",[380,464,465],{},"20",[380,467,462],{},[307,469,470],{},"When the room is a multiple of the sheet, the grid count is exact and the waste allowance covers damaged sheets and mistakes. When it is not, offcuts from one row can often start the next, so the real count lands between the two.",[472,473,475],"h3",{"id":474},"nominal-and-actual-plywood-thickness","Nominal and actual plywood thickness",[353,477,478,491],{},[356,479,480],{},[359,481,482,485,488],{},[362,483,484],{},"Sold as",[362,486,487],{},"Actual thickness (typical)",[362,489,490],{},"Common uses",[375,492,493,504,515,526,537],{},[359,494,495,498,501],{},[380,496,497],{},"1\u002F4 in",[380,499,500],{},"7\u002F32 in (about 6 mm)",[380,502,503],{},"Drawer bottoms, cabinet backs, underlayment",[359,505,506,509,512],{},[380,507,508],{},"3\u002F8 in",[380,510,511],{},"11\u002F32 in",[380,513,514],{},"Wall sheathing, curved work",[359,516,517,520,523],{},[380,518,519],{},"1\u002F2 in",[380,521,522],{},"15\u002F32 in",[380,524,525],{},"Wall and roof sheathing",[359,527,528,531,534],{},[380,529,530],{},"5\u002F8 in",[380,532,533],{},"19\u002F32 in",[380,535,536],{},"Roof decking, subfloors at 16 in on center",[359,538,539,542,545],{},[380,540,541],{},"3\u002F4 in",[380,543,544],{},"23\u002F32 in (18 mm in hardwood plywood)",[380,546,547],{},"Subfloors, cabinets, shelves, furniture",[302,549,551],{"id":550},"example-sheathing-a-10-12-ft-shed","Example: sheathing a 10 × 12 ft shed",[307,553,554],{},"The shed has 8-foot walls with a 3 × 6 ft 8 in door and two 2 × 3 ft windows. The 5 in 12 gable roof has a 1-foot overhang all around, so its footprint is 14 × 12 ft. The floor is 10 × 12 ft. All sheets are 4 × 8, with 10% waste.",[556,557,558,566,574,583],"ol",{},[314,559,560,562,563,565],{},[317,561,325],{}," 2 × (10 + 12) = 44 feet of wall × 8 feet = 352 square feet. Less the door (20 sq ft) and windows (12 sq ft): 320 square feet, so 10 sheets exactly and ",[317,564,439],{}," with waste.",[314,567,568,571,572,565],{},[317,569,570],{},"Roof:"," 14 × 12 = 168 square feet × 1.083 = 182 square feet, so 5.7 sheets and ",[317,573,426],{},[314,575,576,579,580,582],{},[317,577,578],{},"Floor:"," 10 × 12 = 120 square feet, 3.75 sheets and ",[317,581,401],{}," with waste. Laid as whole sheets in a grid it would take 6, but cutting a 2-foot strip off one row covers the gap.",[314,584,585,588],{},[317,586,587],{},"Order:"," 11 + 7 + 5 = 23 sheets. Sheathing straight over the door and windows and cutting them out later would take 13 sheets for the walls instead of 11, but the cutouts can be used for blocking.",[302,590,592],{"id":591},"tips","Tips",[311,594,595,601,607,613,619],{},[314,596,597,600],{},[317,598,599],{},"Run sheets across the framing."," Lay the long side of each sheet across the joists or rafters, and stagger the end joints by at least one framing bay.",[314,602,603,606],{},[317,604,605],{},"Leave expansion gaps."," Space panels about 1\u002F8 inch at edges and ends so they can swell without buckling, unless the panel maker says otherwise.",[314,608,609,612],{},[317,610,611],{},"Mind the stamp."," The grade stamp gives the span rating, exposure rating and which side faces up.",[314,614,615,618],{},[317,616,617],{},"Glue and screw subfloors."," Construction adhesive on every joist and ring-shank nails or screws prevent squeaks.",[314,620,621,624],{},[317,622,623],{},"Buy for the cut list, not just the area."," For cabinets and furniture, sketch the parts on a 4 × 8 grid; grain direction and part sizes often add more waste than the area suggests.",{"title":626,"searchDepth":61,"depth":61,"links":627},"",[628,629,632,633],{"id":304,"depth":61,"text":305},{"id":347,"depth":61,"text":348,"children":630},[631],{"id":474,"depth":82,"text":475},{"id":550,"depth":61,"text":551},{"id":591,"depth":61,"text":592},"PlywoodCalculator","Work out how many sheets of plywood or OSB you need for a floor, walls or a gable roof, for 4×8, 4×9, 4×10, 4×12 and 5×5 sheets, with waste and cost.","md",[638,641,644,647,650,653],{"q":639,"a":640},"How many sheets of plywood do I need?","Divide the area in square feet by the sheet's area, 32 square feet for a 4 × 8 sheet, then add about 10% for waste and round up. A 12 × 16 ft floor is 192 square feet, which is exactly 6 sheets; with 10% extra, buy 7.",{"q":642,"a":643},"How many sheets of plywood do I need for a roof?","Multiply the roof's footprint, overhangs included, by the slope factor for its pitch, then divide by 32. A 14 × 12 ft shed roof at 5 in 12 is 168 × 1.083 = 182 square feet, about 5.7 sheets, so 7 with 10% extra. Steeper roofs have more area for the same footprint.",{"q":645,"a":646},"How many sheets of plywood do I need for walls?","Multiply the total length of the walls by their height, subtract doors and windows if you will not sheathe over them, and divide by 32 for 4 × 8 sheets. Walls taller than 8 feet often use 4 × 9 or 4 × 10 sheets, which cover the plate and rim in one piece.",{"q":648,"a":649},"What is the actual thickness of 3\u002F4 plywood?","Usually 23\u002F32 inch. Plywood is sold by nominal size and is thinner after sanding, so 1\u002F2-inch sheathing is about 15\u002F32 inch, 5\u002F8 is 19\u002F32 inch, and 3\u002F8 is 11\u002F32 inch. Hardwood and Baltic birch plywood is often sold in millimeters, such as 18 mm for 3\u002F4 inch.",{"q":651,"a":652},"What thickness of plywood should I use for a subfloor?","For joists 16 inches on center, 19\u002F32 or 5\u002F8-inch tongue-and-groove panels rated for flooring are common, and 23\u002F32 or 3\u002F4-inch for 24-inch spacing or tile. Check the span rating stamped on the panel, which gives the largest joist spacing it is made for, and follow the tile or flooring maker's requirements.",{"q":654,"a":655},"Should I use plywood or OSB?","Both are used for subfloors, wall sheathing and roof decking, and code treats panels with the same span rating alike. OSB is usually cheaper and comes in more sizes. Plywood holds up better if it gets wet and dries out again, and many builders prefer it for subfloors under tile.","plywood calculator",{},true,[660,661,662,663],"rafter-calculator","board-foot-calculator","deck-board-calculator","tile-calculator",{"title":40,"description":635},"Plywood Calculator – How Many Sheets Do I Need?","2026-10-21","c0a-acU2axUA8qPkopw3edppbxNZv9Iz9lacmGFVFKk",1792531287614]