🧱 Concrete Calculator
Calculate cubic yards of concrete for slabs, footings, and columns. Supports rectangular and circular shapes.
Calculate Now →Choose a Calculator
All calculators use industry-standard formulas and are 100% free to use.
🪵 Board Feet Calculator
Calculate lumber board feet and estimate costs. Enter dimensions and quantity for instant results.
Calculate Now →🏗️ Drywall Estimator
Estimate drywall sheets, tape, joint compound, and screws for any room. Accounts for doors and windows.
Calculate Now →🎨 Paint Coverage Calculator
Calculate gallons of paint needed. Enter room dimensions or total square footage, number of coats, and deductions.
Calculate Now →🪨 Gravel & Aggregate Calculator
Calculate tons of gravel, sand, crushed stone, or topsoil needed for your project.
Calculate Now →🏠 Roofing Calculator
Estimate roofing squares, bundles, underlayment, ridge cap, and nails based on roof dimensions and pitch.
Calculate Now →📐 Stud Calculator
Calculate studs and plates needed for wall framing. Supports 16" and 24" on-center spacing.
Calculate Now →🔲 Tile Calculator
Calculate tiles needed including grout spacing and waste percentage. Works for any tile size.
Calculate Now →🏗️ Fence Material Calculator
Calculate posts, rails, pickets, and concrete for wood privacy fences or chain link fences.
Calculate Now →⚡ Electrical Wire Size Calculator
Determine the correct AWG wire gauge based on NEC voltage drop guidelines for copper or aluminum.
Calculate Now →🧱 Concrete Block / CMU Calculator
Calculate concrete blocks, mortar bags, and rebar for wall construction. Multiple block sizes supported.
Calculate Now →🌿 Mulch Calculator
Estimate cubic yards and bags of mulch needed for landscaping beds. Includes cost breakdown.
Calculate Now →🪵 Deck Board Calculator
Calculate deck boards, joists, screws, and linear footage with adjustable waste factor.
Calculate Now →🪜 Staircase Calculator
Calculate risers, treads, stringer length, and total run with building code compliance check.
Calculate Now →🧊 Insulation Calculator
Estimate insulation for walls, attics, and ceilings. Supports batt, blown-in, and spray foam types.
Calculate Now →🧩 Paver / Patio Calculator
Calculate pavers, leveling sand, gravel sub-base, and edge restraint for patios and walkways.
Calculate Now →🌱 Sod Calculator
Calculate how much sod you need — rolls, pallets, and cost estimates for any lawn area.
Calculate Now →🧱 Retaining Wall Block Calculator
Calculate retaining wall blocks, cap stones, base gravel, and drainage backfill for any wall project.
Calculate Now →🌡️ BTU Calculator — HVAC Sizing
Calculate BTUs needed to heat or cool any room based on size, insulation, climate zone, and sun exposure.
Calculate Now →🔌 Electrical Load Calculator
Calculate residential electrical load for panel sizing using the NEC Article 220 standard method.
Calculate Now →🚿 Plumbing Pipe Size Calculator
Determine correct water supply pipe diameter based on flow rate, velocity, and fixture count.
Calculate Now →🔩 Rebar Calculator
Calculate rebar quantity, weight, spacing, and lap splice lengths for concrete slabs and footings.
Calculate Now →🖼️ Wallpaper Calculator
Calculate wallpaper rolls needed for any room. Accounts for pattern repeat, doors, and windows.
Calculate Now →🌧️ Gutter Size Calculator
Determine gutter size, downspout count, and materials based on roof area and rainfall intensity.
Calculate Now →⚡ Voltage Drop Calculator
Calculate voltage drop for any wire run. Check NEC 3% and 5% limits for copper and aluminum conductors.
Calculate Now →🛣️ Asphalt Calculator
Calculate tons of hot mix asphalt for driveways, parking lots, and roads with cost estimates.
Calculate Now →🌿 Topsoil Calculator
Calculate cubic yards and tons of topsoil for garden beds, lawn leveling, and raised beds with cost estimates.
Calculate Now →👑 Crown Molding Calculator
Calculate crown molding linear feet, pieces, corners, and cost. Enter room dimensions for instant trim estimates.
Calculate Now →📐 Drain Slope Calculator
Calculate drain pipe slope, total drop, and percent grade. Verify plumbing code compliance for any pipe size.
Calculate Now →💨 HVAC Duct Size Calculator
Size HVAC ductwork from CFM requirements. Get round and rectangular duct dimensions with velocity checks.
Calculate Now →🕳️ Post Hole Concrete Calculator
Calculate concrete bags needed for fence posts, deck posts, and mailbox posts. Accounts for post displacement.
Calculate Now →🧱 Brick Calculator
Calculate how many bricks you need for walls and patios. Includes mortar joint allowance and waste factor.
Calculate Now →⚡ Watts to Amps Calculator
Convert watts to amps for DC, single-phase, and three-phase AC circuits with breaker sizing recommendations.
Calculate Now →🏡 Pergola Material Calculator
Calculate posts, beams, rafters, purlins, and hardware for a pergola build with board feet totals.
Calculate Now →🕳️ French Drain Calculator
Calculate gravel, perforated pipe, and landscape fabric for a French drain. Enter trench dimensions for a full list.
Calculate Now →💧 Sprinkler System Calculator
Calculate sprinkler heads, zones, valves, and pipe for a lawn irrigation system based on area and water pressure.
Calculate Now →📏 Baseboard & Trim Calculator
Calculate baseboard trim linear feet, pieces, inside/outside corners, and cost for any room.
Calculate Now →🪵 Plywood & Sheathing Calculator
Calculate 4×8 plywood or OSB sheets needed for walls, floors, and roof sheathing with waste and cost estimates.
Calculate Now →🌀 Ceiling Fan Size Calculator
Find the right ceiling fan blade span and CFM for any room based on square footage and ceiling height.
Calculate Now →🪵 Wainscoting Calculator
Calculate wainscoting panels, chair rail, cap rail, and adhesive for any room from dimensions and panel style.
Calculate Now →🧴 Concrete Sealer Calculator
Calculate gallons of concrete sealer for driveways, patios, and garage floors. Supports multiple sealer types.
Calculate Now →🏚️ Shed Material Calculator
Calculate studs, plates, sheathing, siding, roofing bundles, and floor joists for a complete shed build.
Calculate Now →🏊 Pool Volume Calculator
Calculate swimming pool volume in gallons for rectangular, round, and oval pools with variable depth.
Calculate Now →🗑️ Dumpster Size Calculator
Find the right dumpster size for construction, demolition, or renovation projects based on debris type and scope.
Calculate Now →☀️ Solar Panel Calculator
Calculate solar panels needed based on electricity usage. Get system kW size, panel count, roof space, and savings.
Calculate Now →🌀 Bathroom Vent Fan Calculator
Size your bathroom exhaust fan in CFM per building code. Get duct size and noise level recommendations.
Calculate Now →Why Use BuildCalc Calculators?
Getting material estimates right saves time and money. Over-ordering wastes your budget; under-ordering delays your project. Our calculators use the same industry-standard formulas that professional contractors rely on every day.
- Accurate formulas — based on real-world construction standards
- Completely free — no signup, no email, no limits
- Mobile friendly — use on the job site from your phone
- Instant results — enter measurements, get your answer