Trade Tools & Calculators Directory
Instant material takeoffs, geometric layouts, and code-prescriptive reference calculations for construction, electrical, mechanical, and plumbing trades.
Concrete Calculator
Calculate ready-mix concrete volume (cubic yards, cubic feet, cubic meters) and 40lb/60lb/80lb bags for slabs, footings, and round columns with waste allowance.
Gravel & Aggregate Calculator
Calculate gravel, crushed stone, crusher run, and sand in tons, cubic yards, and truckloads with compaction and waste adjustments.
Wall Framing & Stud Calculator
Calculate wall studs (16"/24" OC), top and bottom plates, headers, king/jack studs, cripples, linear feet, and board feet for residential framing projects.
Drywall & Sheet Goods Calculator
Calculate drywall sheets (4x8, 4x10, 4x12), 1/2" and 5/8" thickness, joint tape, joint compound/mud, and drywall screws with room and opening deductions.
Roof Pitch & Rafter Calculator
Calculate roof pitch (X/12, angle, grade), common rafter line length, overhang, ridge height, birdsmouth seat cuts, roof surface area, and roofing squares.
Stair Stringer & Riser Calculator
Calculate stair riser height, tread depth, total run, stringer board length, bottom riser deduction, headroom clearance, and IRC prescriptive limits.
Deck Material & Framing Calculator
Calculate deck surface boards (composite and wood), joists (12"/16" OC), beams, sonotube pier footings, concrete bags, and hardware fasteners.
Electrical Wire Size & Voltage Drop Calculator
Calculate single-phase, 3-phase, and DC voltage drop, recommended AWG/kcmil wire gauge, copper vs aluminum comparisons, and NEC Table 310.16 ampacity derating.
Electrical Conduit Fill Calculator
Calculate mixed conductor conduit fill percentage (EMT, PVC Sch 40/80, RMC, FMC, LFMC), NEC Chapter 9 Table 1 limits, and jam ratio warnings.
Electrical Box Fill Calculator
Calculate electrical box fill cubic-inch capacity per NEC 314.16 for mixed wire gauges, devices, clamps, and grounds with candidate box recommendations.
Residential Electrical Service Load Calculator
Calculate total residential electrical service load (VA and Amps) per NEC Article 220.82 for 100A, 150A, 200A, and 400A service panel sizing with EV chargers and heat pumps.
HVAC BTU Heating & Cooling Load Calculator
Calculate heating and cooling BTU/hr loads, recommended AC tonnage (1.5 to 5 tons), mini-split sizing, and sensible/latent heat gains across climate zones.
HVAC Duct Sizing & CFM Airflow Calculator
Calculate round duct diameters, rectangular equivalent dimensions, air velocity (FPM), friction loss, and room branch distribution for HVAC systems.
Plumbing DFU & Drainage Pipe Sizing Calculator
Calculate total drainage fixture units (DFU) and size horizontal branch drains, vertical soil stacks, and building drains/sewers per IPC and UPC standards.
Water Supply Fixture Unit (WSFU) & Potable Pipe Sizing Calculator
Calculate total water supply fixture units (WSFU), peak design flow (GPM) via Hunter's Curve, and size copper, PEX, and CPVC potable water main lines and branches per IPC and UPC.