Free Construction Tools
Free calculators and reference tools for building professionals, covering code adoption, parking, and occupant load requirements.
US Building Code Navigator
Browse which building codebooks apply in any US state — including the adopted base code, effective period, and amendments — or look up adoption by code (IBC, IRC, NEC, and more).
Parking Requirements Calculator
Calculate EV parking, EV accessible, and standard accessible parking requirements by US state and occupancy type, based on current building codes.
Occupant Load Calculator
Calculate occupancy loads by area and use type per IBC Table 1004.5, by state and code year.
IBC Guide Hub
The complete guide to the International Building Code — all chapters, occupancy groups, construction types, egress rules, and fire protection requirements.