All Construction Calculators

How many anchor bolts do I need? Free calculator for J-bolt & wedge types at standard 6 ft spacing — includes total count and layout tips.

Sill seal calculator: Estimate foam gasket rolls by foundation perimeter. Free tool for 3.5" & 5.5" widths — prevents air infiltration.

How much pressure treated lumber for sill plates? Instant calculator for 2x4 & 2x6 PT boards — gives linear feet and board count.

How much concrete do I need? Free calculator for slabs, footings & columns — gives cubic yards, 60lb & 80lb bag counts with waste factor.

How much concrete for a slab? Free calculator for garage, patio & driveway slabs — gives cubic yards and bag count for any thickness.

Concrete footing calculator: Estimate cubic yards for continuous & spread footings. Free tool for foundation walls — includes waste factor.

How much concrete for Sonotubes? Free column calculator for 8", 10" & 12" diameter piers — gives cubic yards per column and total.

Concrete steps calculator: How many cubic yards for stairs? Free tool — enter width, rise, run & step count for instant estimate.

Gravel calculator — free tool to estimate cubic yards & tons for any project. Enter dimensions for instant results with cost estimate.

Driveway gravel calculator — how much gravel for your driveway? Free tool for crushed stone, pea gravel & road base with cost per ton.

Block fill calculator — how much concrete to fill CMU blocks? Free tool for 8", 10" & 12" blocks. Get cubic yards and bag count instantly.

Mortar mix calculator — free tool to estimate bags of mortar for block, brick & stone. Covers Type N, S & M with joint thickness options.

Retaining wall calculator — free tool for block, CMU & stone walls. Get block count, cap blocks, gravel backfill & drainage estimates instantly.

How much rebar do I need? Free calculator for slabs, footings & walls — gives bar count, linear feet, weight in lbs, and 20 ft piece total.

Rebar spacing calculator — free tool to find optimal grid layout by load type. Get bar count, linear feet, and chair supports for any slab.

Rim joist calculator: How many boards for your floor perimeter? Free tool for 2x8, 2x10 & 2x12 — includes board count and linear feet.

Free floor joist calculator — get joist count by span & spacing. Covers 16" and 24" OC layouts with sizing charts and board totals.

How many rows of bridging do I need? Free calculator for wood cross-bridging & solid blocking by joist span — instant results.

Subfloor adhesive calculator: How many tubes of construction adhesive? Free estimator based on floor area — covers 28 oz & 10 oz tubes.

How many OSB sheets do I need? Free calculator for 4x8 subfloor panels — accounts for waste and gives exact sheet count instantly.

How many studs do I need? Free wall stud calculator for 16" & 24" OC spacing — includes extras for corners, doors, and window openings.

Bottom plate calculator: Estimate 2x4 or 2x6 sole plates by wall length. Free tool that gives board count and total linear feet needed.

How much lumber for double top plates? Free calculator for 2x4 & 2x6 walls — gives exact board count with overlap stagger included.

Header calculator: What size header for my opening? Free tool for door & window spans — covers 2x6, 2x8, 2x10 & 2x12 headers.

How many sheets of sheathing for exterior walls? Free calculator for 4x8 OSB & plywood panels — includes waste factor estimates.

Free rake wall calculator — get individual stud heights, count & cut angle for walls that follow roof pitch. For gable ends and sloped ceilings.

Free roof truss calculator — get truss count & spacing for any roof length. Enter span for 24" OC layout, cost estimate & design tips.

Free rafter calculator — get rafter length, count & spacing for any roof type. Covers 16" and 24" OC for gable, hip & shed roofs instantly.

Ridge board calculator: How many boards for my roof peak? Free tool for 2x8, 2x10 & 2x12 ridge boards — gives length and count.

How many OSB sheets to sheathe my roof? Free roof decking calculator for 4x8 panels — factors in roof pitch and waste percentage.

Free shingle calculator for roof shingles — get bundles, squares & cost from square feet. Covers 3-tab & architectural asphalt shingles.

How many rolls of roofing underlayment? Free calculator for 15 lb felt, 30 lb felt & synthetic — accounts for overlap and waste.

Drip edge calculator: Estimate linear feet of flashing for your roof. Free tool — gives piece count for standard 10 ft drip edge strips.

What pitch is my roof? Free roof pitch calculator — enter rise & run for instant angle, slope %, and area multiplier. Works for any roof type.

Free roof area calculator — convert flat dimensions to true roof area using pitch multiplier. Get roofing squares & material estimates.

Roof slope calculator — free tool to find pitch, angle, and sloped roof area multiplier. Enter rise & run for instant square footage results.

Free hip roof calculator — get rafter count, hip rafter length, roof area & ridge length. Covers common, hip & jack rafters for any building size.

Free gambrel (barn) roof calculator — get upper & lower rafter counts, roof area & wall height gained. Enter two pitches for instant results.

Free gable roof calculator — get rafter count, ridge length, roof area & gable end area. Enter building dimensions and pitch for instant estimate.

Free lean-to (shed) roof calculator — get rafter count, rafter length, roof area & rise height. Single-slope calculator for additions & sheds.

Free Tyvek housewrap calculator — instant roll count for 3 ft, 5 ft & 9 ft rolls. Accounts for 6" overlap and waste. Get your material list now.

Free vinyl siding calculator — enter wall square footage for exact panel count. Accounts for doors, windows & 10% waste factor instantly.

How many HardiePlank boards do I need? Free fiber cement siding calculator — covers 8.25" & 6.25" exposure with waste included.

Window flashing tape calculator: Estimate linear feet for all openings. Free tool for 4", 6" & 9" wide self-adhesive flashing.

Free soffit calculator — get panel count, J-channel length & vent area by roof perimeter and overhang width. Covers vinyl, aluminum & wood soffit.

Free board and batten siding calculator — get exact board and batten counts by wall area. Covers vertical exterior siding with custom widths and spacing.

How many insulation batts do I need? Free calculator for R-13, R-15, R-19 & R-21 — covers 2x4 and 2x6 wall cavities instantly.

How much drywall do I need? Free calculator for 1/2" & 5/8" sheets — estimates 4x8 and 4x12 panels for walls and ceilings.

Drywall screw calculator: How many screws per sheet? Free estimator for 1-1/4" & 1-5/8" screws — gives total count and boxes needed.

How much joint compound do I need? Free mud calculator for drywall finishing — estimates buckets for taping, bedding & skim coats.

Framing nail calculator: How many pounds of nails for my project? Free tool for 16d & 8d common nails — based on stud count.

How many joist hangers do I need? Free calculator for LUS, LU & HU series connectors — covers floor and ceiling joist framing.

Hurricane tie calculator: Estimate rafter-to-wall connectors for wind resistance. Free tool for H2.5A & H10 Simpson Strong-Tie clips.

How much does lumber cost? Free calculator for 2x4, 2x6, 2x8 & more — estimates total cost by quantity and current prices.

Board feet calculator — enter lumber thickness, width & length for instant BF total. Free hardwood pricing tool with cost estimate for any wood species.

Free plywood calculator — get exact sheet count & cost for any project. Covers 1/4" to 3/4" thickness in 4x8 panels with waste factor.

Paint calculator — free square feet paint estimator for walls & ceilings. Select coats, get instant gallons and cost based on square footage.

Paint cost calculator: Estimate total project cost by quality level. Free tool for economy to premium — includes supplies estimate.

How much primer do I need? Free calculator for new drywall, wood & repaints — adjusts coverage by surface type.

Epoxy calculator — how much epoxy for your garage floor? Free tool for any area. Get gallons, kits & cost estimate for 1-coat and 2-coat systems.

How many deck boards do I need? Free calculator for treated, cedar & composite boards — gives board count, linear feet, and waste factor.

Deck footing calculator: How many concrete piers for my deck? Free tool — gives footing count, post layout, and beam spacing.

Free deck railing calculator — get exact posts, balusters, and material list in seconds. Works for wood, composite & metal rail systems.

Deck stair calculator: How many steps and stringers? Free tool — enter deck height for step count, stringer quantity, and tread boards.

Post hole calculator — how much concrete for fence posts? Free tool for any hole size. Get exact bag count for 50 lb & 80 lb Quikrete bags.

Pond calculator — free tool for volume, liner size & pump capacity. Enter dimensions for rectangular, oval or kidney-shaped ponds instantly.

Fence calculator — how many posts, rails & pickets for your fence? Free fence material calculator for wood privacy fences. Get a complete material list instantly.

Fence post calculator — how many posts and bags of concrete? Free fence post concrete calculator gives post count, concrete bags & gravel for any fence length.

Fence panel calculator — how many pre-made panels for your fence? Free fence material calculator for 6 ft & 8 ft panels. Get panel count, posts & post caps.

Picket fence calculator — how many pickets with custom spacing? Free tool for any picket width & gap. Get picket count, rails, posts & total board feet.

Free deck board spacing calculator — get uniform gap distance between boards for any deck width and board size. Prevents buckling and water pooling.

Flooring calculator — free square footage estimator for any room. Get box count, waste factor & material list for hardwood, LVP, and engineered wood.

Carpet calculator — free tool to estimate square yards, linear feet & pad needed. Works for 12 ft and 15 ft wide rolls with seam planning.

Tile calculator — free tool for ceramic, porcelain & stone floors. Get tile count, boxes, grout bags & thinset needed for any room size.

Laminate flooring calculator — free plank & box estimator with underlayment. Enter room size and plank dimensions for instant material list.

Free stair calculator — enter total rise for instant step count, riser height, tread depth & stringer length. Meets IRC building code.

Free stair stringer calculator — get stringer length, count & layout for any staircase width. Covers 2x10 & 2x12 stringers.

Rise over run calculator — free slope tool. Get ratio, percentage, angle & description instantly. Works for stairs, ramps & roofs.

Free spiral staircase calculator — enter diameter & floor height for tread count, rise per step & rotation. Meets building code.

Free stair landing calculator — split flights with intermediate landing. Get steps per flight, landing height & total run.

Free baluster spacing calculator — get exact count and uniform gap distance for deck and stair railings. Meets IRC 4-inch max spacing code.