Know exactly how much material to buy before you start.
100 free calculators for concrete, masonry, flooring, paint, roofing, framing, landscaping, HVAC and electrical work. Enter your measurements and get quantities, bags, boxes and cost in seconds, in US or metric units.
Concrete & Masonry
Concrete slabs, footings, bags, bricks, blocks and pavers.
Concrete CalculatorCalculate how many cubic yards of concrete you need for a slab, patio, driveway or footing, plus how many 80 lb, 60 lb, 50 lb or 40 lb bags to buy.Concrete Footing CalculatorCalculate cubic yards of concrete for strip footings from length, width and depth, plus how many 80 lb, 60 lb, 50 lb or 40 lb bags to buy and the cost.Concrete Column CalculatorCalculate concrete for round columns, piers and Sonotube forms from diameter and height. Get cubic yards, cubic feet per column and how many bags to buy.Concrete Steps CalculatorCalculate concrete for solid poured steps from the number of steps, riser height, tread depth and width. Get cubic yards, cubic feet and bags of mix to buy.Concrete Cost CalculatorEstimate the cost of a concrete slab from its size, thickness and ready-mix price per cubic yard, with delivery, short-load fees and labor. Get total and cost per sq ft.Brick CalculatorCalculate how many bricks you need for a wall from its length, height and openings, for modular, queen, king and utility sizes, plus bags of mortar mix.Cinder Block CalculatorCalculate how many cinder blocks (CMU) you need for a wall from length, height and openings, with courses, blocks per course, mortar bags and core fill.Mortar CalculatorCalculate how many bags of mortar mix you need to lay bricks or concrete blocks, based on the number of units, joint width and bag size, plus a site-mix estimate.Paver CalculatorCalculate how many pavers you need for a patio, walkway or driveway from the area and paver size, plus gravel base, bedding sand and polymeric sand bags.Retaining Wall Block CalculatorCalculate how many retaining wall blocks, courses and cap blocks you need from wall length and height, plus gravel for the base and the drainage zone behind it.Rebar CalculatorCalculate how much rebar you need for a concrete slab grid from the slab size and bar spacing. Get the bar count, total length, weight and stock pieces to buy.Post Hole Concrete CalculatorCalculate how many bags of fast-setting concrete you need per fence or deck post from the hole diameter, depth and post size, plus total bags and cubic yards.Stone Veneer CalculatorCalculate how many square feet and boxes of stone veneer you need for a wall, with corner pieces, mortar bags, metal lath and water-resistive barrier included.Flagstone CalculatorCalculate how many tons of flagstone you need for a patio or walkway from the area and stone thickness, plus the gravel base, bedding sand and polymeric joint sand.
Flooring & Tile
Flooring, tile, carpet, grout and trim quantities.
Flooring CalculatorFind out how much flooring you need in square feet and how many boxes of laminate, vinyl plank, hardwood or engineered flooring to buy, including waste.Tile CalculatorCalculate how many tiles you need for a floor, wall or backsplash. Enter the area, tile size and grout gap to get tile count, boxes and square footage with waste.Laminate Flooring CalculatorCalculate how many boxes of laminate flooring you need for a room, plus the rolls of underlayment and the quarter round or trim to finish the edges.Vinyl Plank Flooring CalculatorCalculate how many vinyl plank boards and boxes you need for a room from the plank size and planks per box, with 10% waste and an optional cost estimate.Hardwood Flooring CalculatorCalculate how much hardwood flooring you need in square feet, boxes and linear feet of boards, plus the flooring cleats and underlayment paper for the job.Carpet CalculatorCalculate how much carpet to order in linear feet of roll and square yards, based on the room size and a 12, 13.5 or 15 ft roll width, plus padding and cost.Grout CalculatorCalculate how many pounds and bags of grout you need from the tile size, tile thickness, joint width and area. Works for floors, walls and backsplashes.Thinset CalculatorCalculate how many 50 lb bags of thinset mortar you need from the tile area and trowel notch size, with an allowance for back-buttering large format tile.Baseboard CalculatorCalculate how many linear feet of baseboard you need for a room after deducting doorways, how many 8, 12 or 16 ft pieces to buy, plus corners and nails.Epoxy Floor CalculatorCalculate how many gallons of epoxy floor coating you need for a garage or basement from the floor size, number of coats and coverage per gallon, plus kits and flakes.Backsplash CalculatorCalculate how many tiles you need for a kitchen backsplash from the counter length and height, plus the square footage to buy, boxes, tile adhesive and cost.Countertop CalculatorCalculate countertop square footage from the counter run, depth, island and backsplash, then see how many quartz, granite or laminate slabs you need and the cost.
Paint & Walls
Paint, primer, drywall and wallpaper estimates.
Paint CalculatorWork out how many gallons of paint you need for a room. Enter the room size, doors, windows and number of coats to get wall, ceiling and total paint quantities.Drywall CalculatorCalculate how many sheets of drywall you need for a room, plus screws, joint compound and tape. Supports 4x8, 4x10 and 4x12 sheets with or without the ceiling.Primer CalculatorCalculate how many gallons of primer you need for a room based on wall area, doors, windows and the surface: painted walls, new drywall, bare wood or a dark color.Ceiling Paint CalculatorCalculate how many gallons of ceiling paint you need from the room size, number of coats and ceiling texture. Popcorn and textured ceilings soak up more paint.Wallpaper CalculatorCalculate how many rolls of wallpaper you need for a room from the wall height, perimeter, roll size and pattern repeat, with strips per roll and strips needed.Crown Molding CalculatorCalculate how many linear feet of crown molding a room needs and how many 8, 12 or 16 ft pieces to buy, with inside and outside corner counts, finish nails and cost.Joint Compound CalculatorCalculate how many gallons and buckets of joint compound you need to tape, finish or skim coat drywall, plus rolls of paper or mesh tape and the weight to haul home.Wall Square Footage CalculatorCalculate the square footage of the walls in a room from its length, width and ceiling height, minus doors and windows, for paint, drywall, wallpaper or tile.Stucco CalculatorEstimate bags of base coat and finish coat stucco, metal lath sheets and building paper for a wall, for a traditional three-coat or a one-coat stucco system.Plaster CalculatorEstimate bags of veneer plaster or gypsum basecoat, blueboard or lath, and mixing water for a wall, with coverage for skim coat, basecoat and two-coat plaster.Paint Cost CalculatorEstimate what it costs to paint a room: gallons of paint and primer to buy, material cost, optional pro labor per square foot and the cost per square foot of wall.
Roofing & Siding
Roof area, shingles, pitch, siding and gutters.
Roofing CalculatorCalculate roof area, roofing squares and how many bundles of shingles you need from your home's footprint and roof pitch. Includes underlayment and waste.Shingle CalculatorCalculate how many bundles of shingles you need from your roof area, plus ridge cap bundles, starter strip bundles and pounds of roofing nails, with waste included.Roof Pitch CalculatorCalculate roof pitch as x/12, the roof angle in degrees, slope percent and the pitch factor from a rise over run or from the total rise and building span.Metal Roofing CalculatorCalculate how many metal roofing panels, screws, closure strips and ridge cap you need from the eave length, panel length and panel coverage width, with waste.Rafter Length CalculatorCalculate common rafter length from the building span and roof pitch, including the ridge board deduction and overhang, plus the rise, cut angle and board length to buy.Siding CalculatorCalculate how many squares and boxes of vinyl siding you need from your house dimensions, plus starter strip, J-channel and corner posts, minus doors and windows.Gutter CalculatorCalculate how many gutter sections, downspouts, hangers, end caps and elbows you need from the total eave length, with an optional material cost per linear foot.Soffit and Fascia CalculatorCalculate soffit area and panels, fascia board length and 12 ft pieces, plus J-channel and F-channel for the eaves and gable rakes of a house from a few measurements.Roof Snow Load CalculatorCalculate the design roof snow load from the ground snow load, roof pitch, exposure and thermal factors using the ASCE 7 method, plus the total snow weight on the roof.
Framing, Decks & Fences
Lumber, studs, decks, stairs and fence materials.
Fence CalculatorCalculate how many fence posts, rails, pickets and bags of concrete you need for a wood privacy or picket fence based on its total length and post spacing.Deck CalculatorCalculate how many deck boards, joists and screws you need for a deck. Works for wood and composite decking with adjustable board width, length and gap.Stud CalculatorCalculate how many studs and plates you need to frame a wall at 16 or 24 in on center, including extra studs for corners and openings and 10% waste.Stair CalculatorCalculate the number of risers and treads, the exact riser height, total run and stringer length for a staircase from the floor-to-floor rise, with IRC limits flagged.Plywood CalculatorCalculate how many sheets of plywood or OSB you need for a subfloor, wall sheathing or roof deck from the area, sheet size and waste, plus fasteners and cost.Board Foot CalculatorCalculate board feet from the thickness, width and length of lumber, for one board or a whole order, and estimate the cost at a price per board foot.Floor Joist CalculatorFind the smallest floor joist size that spans your floor from the IRC span tables by species, spacing and live load, plus the number of joists, lumber and rim joist.Baluster Spacing CalculatorCalculate how many balusters fit between two railing posts and the exact gap and on-center spacing that keeps every opening under the 4 in code limit.Pergola CalculatorEstimate the posts, beams, rafters, top slats and concrete for a freestanding pergola from its size, rafter spacing and overhang, with stock lumber lengths to buy.Shed Material CalculatorEstimate the studs, plates, joists, sheathing, rafters and shingle bundles for a gable or lean-to storage shed from its footprint, wall height and roof pitch.Board and Batten CalculatorCalculate how many boards, battens, linear feet of lumber and nails you need for board and batten siding on a wall, with openings deducted and waste added.Chain Link Fence CalculatorCalculate the line posts, terminal posts, top rail, fabric rolls, ties, tension bars and concrete for a chain link fence from its length, height and gates.Vinyl Fence CalculatorCalculate how many vinyl fence panels, posts, post caps and bags of concrete you need from the fence length, panel width, gates and corners, split out by post type.
Landscaping & Outdoor
Mulch, gravel, topsoil, sod and other bulk materials.
Mulch CalculatorCalculate how many cubic yards or bags of mulch you need for a garden bed. Enter the bed size and mulch depth to get cubic yards, 2 cu ft bags and 3 cu ft bags.Gravel CalculatorCalculate how much gravel, crushed stone, pea gravel or sand you need in cubic yards and tons for a driveway, path, patio base or drainage bed.Topsoil CalculatorCalculate how much topsoil you need in cubic yards, tons and 40 lb bags for a new lawn, raised bed or top-dressing. Enter the area and soil depth.Sod CalculatorCalculate how much sod you need for a new lawn in square feet, rolls or slabs and pallets. Enter the lawn size, waste allowance and pallet coverage.Grass Seed CalculatorCalculate how many pounds of grass seed you need for a new lawn or overseeding. Uses standard seeding rates for fescue, bluegrass, ryegrass, Bermuda and zoysia.Asphalt CalculatorCalculate how many tons of hot-mix asphalt you need for a driveway, parking pad or overlay. Enter the area and thickness to get tons, cubic yards and cost.Pool Volume CalculatorCalculate how many gallons of water your swimming pool holds. Works for rectangular, round and oval pools with a shallow end and a deep end.Sand CalculatorCalculate how much sand you need in cubic yards, tons and 50 lb bags for a paver base, sandbox, pool base or fill layer from the length, width and depth of the area.Fill Dirt CalculatorCalculate how many cubic yards of fill dirt to order for grading or a pad, with a compaction allowance added, plus the weight in tons and the number of dump truck loads.Pond Volume CalculatorCalculate how many gallons a garden pond holds, the liner size to buy including depth and overlap, the pump size in GPH and how many goldfish it can support.Sprinkler CalculatorCalculate how many sprinkler heads and zones a lawn needs from its size, head type and the flow at the hose bib, plus the run time per zone to apply 1 inch a week.Artificial Turf CalculatorCalculate how much artificial turf to order from a 15, 12 or 13 ft roll, plus seam tape, infill, crushed rock base and turf nails for a synthetic lawn or putting green.Raised Bed Soil CalculatorCalculate how much soil fills a raised garden bed in cubic feet, cubic yards and bags, with the compost, peat and vermiculite breakdown for a square foot garden mix.French Drain CalculatorCalculate the gravel, perforated pipe and landscape fabric for a French drain from the trench length, width and depth, plus the soil to haul away and the minimum slope.Lawn Fertilizer CalculatorCalculate how many pounds of lawn fertilizer to apply from the lawn size, nitrogen rate per 1,000 sq ft and bag analysis, plus bags to buy and the spreader rate.
Insulation & HVAC
Insulation, BTU sizing and ventilation.
Insulation CalculatorCalculate how many packages and batts of fiberglass insulation you need for a wall, floor or attic from the area, framing spacing, R-value and coverage.BTU CalculatorCalculate how many BTUs of air conditioning a room needs from its size, climate, sun exposure and occupants to size a window unit or mini-split.Spray Foam CalculatorCalculate how many board feet of spray foam you need for a wall, ceiling or crawlspace, the R-value at that thickness, and how many 600 or 200 board foot kits to buy.Blown-In Insulation CalculatorCalculate how many bags of blown-in cellulose or fiberglass you need to bring an attic to R-38, R-49 or R-60, plus the depth to blow and the coverage per bag.Furnace Size CalculatorCalculate what size furnace a house needs in BTU per hour from its square footage, climate zone, insulation and ceiling height, matched to standard 80% or 95% AFUE sizes.Mini Split CalculatorCalculate what size ductless mini split head a room needs in BTU from its area, climate, sun, insulation and occupants, with sizing for winter heating and multi-zone use.Heat Loss CalculatorCalculate a room's heat loss in BTU per hour through walls, ceiling, floor, windows and air leakage from R-values, U-factor and design temperatures to size a heater.Attic Ventilation CalculatorCalculate the attic ventilation you need under the IRC 1/300 or 1/150 rule in square inches of net free area, split into soffit intake and ridge exhaust vents.Dehumidifier Size CalculatorFind what size dehumidifier you need in pints per day from the room size and how damp it is, using the AHAM sizing chart and the 2019 DOE test ratings.Water Heater Size CalculatorSize a water heater by first hour rating from the showers, baths, dishwasher and laundry loads in your busiest hour, with gas, electric and tankless recommendations.
Electrical & Plumbing
Wire size, voltage drop, pipe volume and loads.
Wire Size CalculatorFind the wire gauge (AWG) for a circuit from the load in amps, run length, voltage and allowed voltage drop, using NEC ampacity tables for copper and aluminum.Generator Size CalculatorAdd up running and starting watts for a refrigerator, sump pump, furnace, well pump, air conditioner and lights to find the generator size in kW you need.Voltage Drop CalculatorCalculate the voltage drop in volts and percent for a given wire size, load, run length and voltage, plus the longest run that stays inside the NEC 3% recommendation.Electrical Load CalculatorCalculate the service load of a house in VA and amps with the NEC 220.82 optional method from floor area, appliances, heating and cooling, and see what service size fits.Conduit Fill CalculatorCheck conduit fill percent for THHN conductors in EMT or PVC with NEC Chapter 9 tables, and find how many wires fit a conduit or the smallest conduit for your wires.Pipe Volume CalculatorCalculate how much water a pipe holds in gallons and cubic feet from its inside diameter and length, with copper, PEX and PVC sizes built in, plus the hot water wait.Pipe Size CalculatorSize the water supply main for a house by the fixture unit method: count bathrooms and appliances for WSFU, convert to peak gpm, and pick a pipe for the pressure and run.Septic Tank Size CalculatorEstimate the septic tank size a house needs from its bedroom count, plus the design daily flow, drain field absorption area and trench length for your soil type.Sump Pump Size CalculatorSize a sump pump from how fast water rises in the pit, the vertical lift and the discharge run, giving inflow in gpm, total dynamic head and the pump horsepower you need.
Measurement & Cost
Square footage, cubic yards, board feet and cost tools.
Square Footage CalculatorCalculate the square footage of a room, floor, wall or lot. Handles rectangles, circles, triangles and L-shaped rooms and converts to square yards and acres.Cubic Yard CalculatorConvert length, width and depth into cubic yards and cubic feet for concrete, gravel, soil or mulch, and estimate the weight in tons for common materials.Cubic Feet CalculatorCalculate the cubic feet of a box, appliance or room from its length, width and height in inches or feet, with the volume in cubic inches, cubic yards and gallons.Excavation CalculatorCalculate the bank cubic yards to dig, the loose volume after swell, the weight in tons, how many truckloads it takes to haul away, and the haul-off cost.Renovation Cost CalculatorEstimate a renovation budget range from square footage, project type, finish quality and region, with a midpoint, contingency reserve and cost per square foot.Material Waste CalculatorAdd the right waste factor to any measured quantity of flooring, tile, drywall, paint, roofing, concrete, lumber, brick or siding to find how much to actually buy.Linear Feet CalculatorConvert square feet to linear feet of boards from the board width, or find the linear feet around a room, then add waste and count the pieces of stock to buy.
Why use CalcBuilt?
Built on real formulas. Every calculator uses the same math contractors and suppliers use, with waste factors and standard material sizes built in.
Instant results. No sign-up, no downloads. Results update as you type, and every tool works on your phone at the store.
Explained, not just calculated. Each tool includes a short guide to the formula and the assumptions, so you can adjust for your own project.