Home & DIY Calculators

Free material and cost calculators for home and DIY projects — figure out exactly how much you need, and what it costs.

CalcBooth brings home and DIY material and cost calculators together in one place. Each tool runs right in your browser, asks for the few measurements that actually drive the answer, and returns a real quantity — squares of roofing, bags of concrete, cubic yards of mulch — plus a cost estimate and a ready-to-use shopping list. Everything is free, instant, and built for the way a project really works: measure once, enter your numbers, and walk into the store knowing exactly what to buy.

Which calculator do I need?

Calculator	What it works out
Concrete Calculator	Calculate how much concrete you need for a slab, footing or column — enter your dimensions to get the volume in cubic yards, the number of 40, 60 or 80 lb bags, and an estimated cost.
Concrete Cost Calculator	Estimate what a concrete pour will cost — enter the cubic yards (or slab dimensions), price per yard, delivery and any short-load fee to get a low-to-high total and the cost per cubic foot.
Concrete Bags Calculator	Find how many bags of concrete you need — enter your slab, footing or column dimensions and the bag size to get the bag count for 40, 60 and 80 lb bags, plus an estimated cost.
Dry Pour Concrete Calculator	Size a dry-pour (pour-and-soak) concrete slab — enter your slab dimensions to get the number of 40, 60 or 80 lb bags you need to spread dry and then wet, plus an estimated cost.
Deck Cost Calculator	Estimate what it costs to build a deck — enter the size, material, height and railing to get a low-to-high installed total, the cost per square foot, and a materials-versus-labor breakdown.
Decking Calculator	Calculate how many deck boards you need — enter your deck size, board width, board length and gap to get the board count, lineal feet, joists and fasteners, with a shopping list.
Floating Deck Calculator	Plan a floating (ground-level) deck — enter the size to get the number of deck blocks, joists, deck boards and the gravel base you need, with an estimated material cost.
Mulch Calculator	Find how much mulch you need — enter your bed area and depth to get the cubic yards, the number of 2 cu ft bags, and an estimated cost, with a coverage breakdown.
Sand Calculator	Calculate how much sand you need — enter your area and depth to get the volume in cubic yards and cubic feet, the weight in tons, and the number of 50 lb bags, with cost.
Soil Calculator	Find how much topsoil or dirt you need — enter your area and depth to get the cubic yards, the weight in tons, and the number of 40 lb bags, with a coverage and cost breakdown.
Cubic Yards Calculator	Convert any length, width and depth into cubic yards and cubic feet — enter your dimensions in feet or inches to size bulk material like concrete, gravel, mulch and soil.
BTU Calculator	Find how many BTUs you need to cool a room — enter the size, ceiling height, sun exposure and climate to get the cooling BTUs and a recommended air conditioner size in BTU and tons.
Mini Split Sizing Calculator	Find what size mini split you need — enter the room size, ceiling height, sun and climate to get the cooling BTUs and the nearest standard mini-split size (9k, 12k, 18k, 24k BTU).
BTU Converter	Understand what a BTU is and convert between BTU per hour, kilowatts, watts and tons of cooling — enter any value to see the equivalents instantly.
Gravel Calculator	Calculate how much gravel or crushed stone you need — enter your area and depth to get the volume in cubic yards, the weight in tons, and the number of 50 lb bags, with cost.
Asphalt Calculator	Calculate how much asphalt you need — enter your driveway or lot size and thickness to get the tons of hot-mix asphalt, the cubic yards, and an estimated cost.
Paver Calculator	Calculate how many pavers you need for a patio, walkway or driveway — enter your area and paver size to get the paver count plus base gravel, bedding sand, polymeric sand and an estimated cost.
Polymeric Sand Calculator	Calculate how much polymeric sand you need for paver joints — enter your area, paver size and joint width to get the number of 50 lb bags, coverage per bag and cost.
Fence Calculator	Calculate fence materials — enter your fence length, post spacing and height to get the number of posts, rails, pickets and concrete bags, plus an estimated cost.
Sod Calculator	Calculate how much sod you need — enter your lawn length and width to get the square footage, number of rolls and pallets, and an estimated cost, with waste included.
Retaining Wall Calculator	Calculate retaining-wall materials — enter your wall length, height and block size to get the number of wall blocks, cap blocks and base gravel, plus an estimated cost.
Paint Calculator	Find how much paint you need — enter your room size, ceiling height, number of coats and doors and windows to get the gallons of wall paint (and ceiling), with cost.
Tile Calculator	Calculate how many tiles you need — enter your area and tile size to get the tile count and number of boxes, with a waste allowance for cuts and breakage.
Flooring Calculator	Find how much flooring you need — enter your room size, the coverage per box and a waste allowance to get the square footage and number of boxes of laminate, vinyl or hardwood.
Drywall Calculator	Calculate how much drywall you need — enter your room size and sheet size to get the number of sheets plus joint compound, tape and screws, with a waste allowance.
Roof Pitch Calculator	Find your roof pitch from a simple rise-and-run measurement — get the pitch in X-in-12, the angle in degrees, the slope factor and the rafter length per foot of run.
Roofing Calculator	Calculate how much roofing material you need — enter your roof footprint and pitch to get roofing squares, shingle bundles, underlayment, drip edge and nails, with a shopping list.
Roof Replacement Cost Calculator	Estimate what a new roof costs — enter your roof size, pitch, material and whether you need a tear-off to get a low-to-high total, the cost per square, and a materials-versus-labor breakdown.
Board Foot Calculator	Convert any stack of lumber into board feet - enter the piece count, thickness, width and length to get total board feet, lineal feet and the cost at your price per board foot.
Plywood Calculator	Work out how many sheets of plywood you need - enter the area to cover and the sheet size to get the sheet count with a waste allowance, plus the cost at your price per sheet.
Siding Calculator	Estimate how much siding your house needs - enter the perimeter, wall height and gable ends to get the squares of siding after openings and waste, plus a material cost estimate.
Rebar Calculator	Plan the rebar grid for a concrete slab - enter the slab size and grid spacing to get the bars each way, total lineal feet with lap splices, the 20 ft sticks to buy and the chairs to support them.
Grass Seed Calculator	Work out how much grass seed you need - enter your lawn area, the grass type and whether you are seeding new or overseeding to get the pounds of seed and what a 50 lb bag covers.
Fill Dirt Calculator	Calculate how much fill dirt you need - enter the area and depth to get the cubic yards and the weight in tons, with a bulk cost estimate for grading, holes and low spots.
Mortar Calculator	Work out how many bags of mortar you need - enter your wall size and whether you are laying block or brick to get the unit count and the 80 lb mortar bags, based on manufacturer yields.
Pool Volume Calculator	Work out how many gallons your pool holds - enter the shape, size and depths to get the water volume in gallons, liters and cubic feet, plus what filling it costs at your water rate.
Carpet Calculator	Work out how much carpet to order - enter the room size and the roll width to get the square yards off the bolt, the padding, tack strip and seam tape, plus a material cost estimate.
Carpet Installation Cost	Estimate what carpet installation costs - enter the room size, carpet price, labor rate and whether the old carpet has to come up to get an installed total, the cost per square foot and a full breakdown.
Gutter Size Calculator	Find what size gutter your roof needs - enter the roof area, gutter run and local rainfall to get the required flow in gallons per minute, the gutter and downspout size from the plumbing code, how many downspouts and how much fall to set.
Gutter Installation Cost	Estimate what new gutters cost - enter the run, material, number of stories and whether the old gutters come off to get an installed total, the cost per linear foot and a breakdown by line item.
Driveway Cost Calculator	Estimate what a driveway costs to pave - enter the size and pick asphalt, concrete or gravel to get an installed price range, the cost per square foot and the tonnage of hot mix, with tear-out and grading priced separately.
Blown-In Insulation Calculator	Work out how much blown-in insulation your attic needs - enter the area, what is already up there and your climate zone to get the depth to add, the volume, the bag count and what a professional install should cost.

How these estimates are built

Every calculator in this category publishes the formula it runs, the constants it assumes, a worked example you can reproduce by hand, and the standard or manufacturer data sheet each constant comes from. Quantities include an adjustable waste allowance and round up to whole units, because you cannot buy part of a bag or box.

United States — national average Prices as of 2026

Cost figures are national US ranges and are material-only unless a calculator says "installed", so they exclude tax, permits and local labour rates. These are planning estimates, not quotes — read the full calculation methodology for what they cover, and the disclaimer for the structural and HVAC limits that apply.

Which calculator do I need?

How these estimates are built

More categories