Free Contractor Calculators
59+ trade-specific and business calculators in one place. Search by name, trade, or keyword — or jump straight to your trade hub for everything in one view.
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HVAC Load Calculator
Calculate heating and cooling loads for residential and commercial buildings.
HVACElectrical Load Calculator
Determine total electrical load and service panel size requirements.
ElectricalPlumbing Pipe Sizing
Find the right pipe diameter based on fixture units and flow rates.
PlumbingConcrete Volume Calculator
Calculate cubic yards of concrete for slabs, footings, and columns.
GeneralRoofing Material Calculator
Estimate shingles, underlayment, and materials by roof area and pitch.
RoofingLandscaping Material Calculator
Calculate cubic yards of mulch, gravel, topsoil, and other materials.
LandscapingDrywall Calculator
Estimate sheets of drywall, joint compound, tape, and screws needed.
GeneralPaint Coverage Calculator
Calculate gallons of paint needed based on surface area and coats.
PaintingProfit Margin Calculator
Calculate gross and net profit margins for jobs and your overall business.
BusinessSelf-Employment Tax Calculator
Estimate your self-employment tax, including Social Security and Medicare.
BusinessHourly Rate Calculator
Figure out what to charge per hour based on your costs and income goals.
BusinessSoftware Quiz — Which Software Should I Use?
Answer 5 questions about your trade, team, and priorities — get a personalized software recommendation in 60 seconds.
BusinessSoftware Cost Calculator (TCO)
Calculate the real total cost of contractor software — including hidden onboarding fees, per-user costs, and payment processing.
BusinessCrew Day Cost Calculator
Calculate the true daily cost of putting your crew on a job — burdened labor, vehicle, fuel, tools, and overhead allocation.
BusinessMax Lead Cost Calculator
Find the most you can afford to pay per lead based on close rate, average job profit, and marketing budget. Compare against HomeAdvisor, Angi, Google LSA pricing.
BusinessW-2 vs 1099 Employee Cost
Calculate the true loaded cost of a W-2 employee vs a 1099 sub. Includes payroll tax, workers comp, benefits, PTO, training, and recruiting.
BusinessEquipment Buy vs Lease
Compare buying vs leasing your next truck, skid steer, lift, or excavator. See total cost over time, year-1 cash flow impact, and which option wins for your situation.
BusinessStair Calculator
Calculate risers, treads, stringer length, and stair angle with IRC code compliance checking.
CarpentryFence Calculator
Estimate posts, rails, pickets, concrete, and cost for wood, vinyl, or chain link fences.
GeneralTile & Flooring Calculator
Calculate tiles, grout, thinset, and cost for any tile size, pattern, and room dimensions.
FlooringGrout & Thinset Calculator
Pounds of grout and bags of thinset mortar from tile size, joint width, thickness, and trowel notch.
FlooringExcavation & Dirt Removal Calculator
Cubic yards of excavation, hauled volume after soil swell, and dump-truck loads for footings, foundations, and grading.
General ContractingRebar Calculator
Calculate rebar quantity, weight, tie wires, and chairs for concrete slab reinforcement.
ConcreteVoltage Drop Calculator
Calculate voltage drop, wire sizing, and NEC compliance for electrical circuits.
ElectricalDeck Calculator
Estimate deck boards, joists, posts, railing, and cost by material type.
CarpentryGravel & Aggregate Calculator
Calculate tons of gravel, crushed stone, sand, or topsoil by area and depth.
LandscapingBrick Calculator
Estimate bricks, mortar bags, sand, and wall ties for masonry wall construction.
MasonryBoard Foot & Lumber Calculator
Calculate board feet, linear feet, and cost for lumber orders and material lists.
CarpentryPaver Calculator
Estimate pavers, base gravel, sand, and polymeric sand for patios and walkways.
LandscapingConcrete Block (CMU) Calculator
Calculate blocks, mortar, rebar, and grout for masonry walls with bond beams.
MasonryInsulation Calculator
Estimate insulation batts, bags, or sheets by R-value, area, and insulation type.
GeneralCarpet Calculator
Calculate carpet in square yards, seam length, padding, and cost for rooms.
FlooringAsphalt Calculator
Estimate tons of asphalt for driveways, parking lots, and overlays.
PavingSquare Footage Calculator
Calculate area for rectangles, circles, triangles, and L-shaped rooms with unit conversions.
GeneralWall Framing Calculator
Calculate studs, plates, headers, sheathing, and nails for wall framing.
CarpentrySiding Calculator
Estimate siding panels, trim, starter strip, and accessories by wall area.
GeneralRetaining Wall Calculator
Calculate blocks, cap stones, drainage gravel, geogrid, and drain pipe for retaining walls.
LandscapingRoof Pitch Calculator
Calculate roof pitch, angle, slope percentage, and area multiplier from rise and run measurements.
RoofingCFM & Airflow Calculator
Calculate required CFM, air changes per hour, and duct velocity for ventilation systems.
HVACStructural Wood Designer — Beams, Headers, Posts, Studs
Engineering-based sizing for 5 scenarios: floor/deck joists & rafters, window/door headers (guided load takedown), posts & columns (NDS buckling), bearing-wall studs, and a wind-bracing guide.
CarpentryFooting Size Calculator
Size square, round, and continuous concrete footings from load and soil bearing capacity using IRC presumptive values.
CarpentryBeam Span Calculator
Quick beam-span estimate by species, size, and load for floor, roof, and deck beams. (For engineering-accurate results, use the Wood Beam Designer.)
CarpentryFloor Joist Span Calculator
Calculate maximum joist span per IRC tables by size, spacing, species, and live load.
CarpentryFrench Drain Calculator
Estimate gravel, pipe, landscape fabric, and cost for French drain installation.
LandscapingConcrete Driveway Cost Calculator
Estimate concrete, reinforcement, and total cost for driveway projects by size and finish type.
ConcretePlywood & Sheathing Calculator
Calculate number of plywood sheets, weight, and cost by area and thickness.
CarpentrySand Calculator
Calculate cubic yards and tons of sand needed for play areas, masonry, pavers, and fill.
GeneralWallpaper Calculator
Calculate rolls of wallpaper needed with pattern repeat matching and waste factor.
PaintingBaluster & Spindle Calculator
Calculate baluster quantity and spacing for railings with IRC 4-inch sphere rule compliance.
CarpentryMortar Calculator
Estimate bags of mortar mix and sand for brick or block walls by joint thickness.
MasonrySonotube & Concrete Pier Calculator
Calculate concrete volume, bag count, and rebar for cylindrical piers and footings.
ConcreteSnow Load Calculator
Calculate roof snow loads using ASCE 7 factors for exposure, thermal, and slope conditions.
RoofingRafter Length Calculator
Calculate rafter length, ridge height, birdsmouth cut, and tail cut for common and hip rafters.
CarpentryMiter Angle Calculator
Calculate miter and bevel angles for corners, polygons, and crown molding compound cuts.
CarpentryWire Size Calculator
Determine minimum wire gauge by amperage, distance, and voltage with NEC ampacity tables.
ElectricalGutter & Downspout Calculator
Calculate gutters, downspouts, hangers, and accessories by roof area and rainfall intensity.
RoofingConcrete Steps Calculator
Calculate concrete volume, form boards, and IRC code compliance for concrete stairs.
ConcreteMarkup vs Margin Calculator
Convert between markup and profit margin percentages. The #1 pricing mistake contractors make.
BusinessUnit Converter
Convert between construction units — feet, meters, inches, yards, gallons, liters, and more.
General59 calculators available. More coming soon.