Professional Engineering Calculations Made Easy
Standards-compliant calculators for electrical, HVAC, mechanical, and structural engineering. No login required, completely free.
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Our most powerful calculators with interactive visualizations, real-time feedback, and professional PDF exports. These tools have no free equivalent anywhere.
Calculator Categories
Choose your engineering discipline to find the right calculator
Electrical
Power systems, cable sizing, voltage drop, and short circuit calculations
Heating
Heat loss, radiator sizing, boiler selection, and heating system design
Cooling
Cooling load, air conditioning, and refrigeration calculations
Ventilation
Airflow, duct sizing, pressure drop, and ventilation system design
Plumbing
Water supply, drainage, pressure calculations, and plumbing system sizing
Fire Protection
Sprinkler systems, hydrants, and fire safety calculations
Mechanical & Structural
Beam deflection, structural analysis, and mechanical engineering calculations
Utilities
Unit conversion, water properties, and general engineering tools
Why Engineers Choose Enginist
Professional-grade engineering tools with features you won't find elsewhere. No login walls, no premium tiers, just powerful calculations.
Professional PDF Reports
Export calculations as professionally formatted PDF documents with QR codes for instant sharing.
Shareable Calculation Links
Share your calculations with colleagues via URL. All inputs are preserved in the link.
Real-Time Visualizations
See your calculations come to life with interactive charts and drag-to-explore curves.
Standards Compliance
Built on IEC 60364, ASHRAE, NEC, and EN standards with transparent formula references.
Calculation History
Your calculations are saved locally. Review, compare, and reuse past results anytime.
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120+ Countries
P.E.-Licensed Engineers
IEC, ASHRAE, EN Standards
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