Professional calculator suites built for industry experts. Fast, accurate, and always accessible.
Choose Your Industry
Drilling, completion, production, and reservoir engineering calculators for oil & gas professionals.
Rotating machinery, fluid mechanics, heat transfer, stress analysis, and machine design for engineers.
Concrete, steel, lumber, excavation, and project estimation calculators for builders and contractors.
Wire sizing, load calculations, conduit fill, voltage drop, and NEC reference tools for electricians.
Load calculations, ductwork sizing, refrigerant charges, and system design tools for HVAC technicians.
Pipe sizing, water pressure, drainage calculations, and fixture unit tools for plumbers.
Fuel consumption, hull speed, displacement, navigation, and vessel maintenance calculators.