Manufacturing calculators
Construction and shop-floor estimates without uploading job files.
Concrete yield calculator
Multi-section slab, wall, footing, and column volumes with bag or ready-mix totals, waste, and cost.
HVAC BTU sizing calculator
Room or whole-home BTU and tonnage from climate, insulation, windows, and occupancy.
NEC wire size calculator
Minimum AWG from NEC 310.16 ampacity and voltage drop with conduit derating.
Voltage drop calculator
VD volts and percent with full AWG comparison table and NEC 3% / 5% status.
Solar panel output estimator
Daily and annual kWh, payback, 25-year ROI chart, and CO2 offset by NREL peak sun hours.
Tile coverage calculator
Multi-section area, grout footprint, layout waste, tiles and boxes, cost, leftover count.
Paint coverage calculator
Wall rows, door and window deductions, coats, texture, ceiling, gallons, cans, and cost.
Board foot calculator
F8 lumber rows, thickness by width by length formula, project waste, and cost estimate.