Built for the field
Seven app suites covering every major trade — each calculator validated against the relevant codebook (NEC, IPC, IRC, NFPA, UPC). Free with rewarded ads, or unlock Pro for $2.99 — unlimited calculations, PDF export, no ads.
Electools
Conduit fill, electrical load, voltage drop, wire size, box fill, motor FLA, breaker, grounding, transformer.
HVAC Tools
Heat load, duct sizing, refrigerant charge, psychrometric, airflow CFM, pipe sizing, unit converter.
PlumbTools
Drainage, fixture units, water pipe, gas pipe, head loss, slope, trap-vent, septic, water heater.
SolarTools
Solar panel sizing, inverter, battery, voltage drop, conduit fill, wire sizing, ROI, ground-mount.
FireTools
Sprinkler hydraulic, fire pump, hazard classification, hanger spacing, standpipe, pipe schedule.
CarpentryTools
Rafter, framing, deck, fence, stair, drywall, lumber, roof area, span tables, trim, angle/miter.
BuildTools
Concrete volume, fence material — quick calculators for general contractors.