Manufacturing calculators
Construction and shop-floor estimates without uploading job files.
These calculators handle the quantitative side of construction, electrical, and trades work. The concrete yield calculator sums volumes across slabs, walls, footings, and columns to produce a total cubic yard estimate for ready-mix ordering. The HVAC BTU sizing calculator outputs heating and cooling requirements and tons of capacity from room dimensions, climate zone, insulation quality, and window area — covering both single-room and whole-home loads.
The NEC wire size calculator finds minimum AWG from NEC 310.16 ampacity tables and voltage drop requirements with conduit derating applied. The voltage drop calculator produces a full AWG comparison table against the NEC 3% and 5% thresholds. The solar panel output calculator estimates daily and monthly kWh generation from panel wattage, sun hours, and system efficiency. Board-foot, paint coverage, and tile coverage calculators handle the material-quantity math for finish trades. All tools run in the browser with no job data sent to a server.
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.