Professional Engineering Calculations Made Easy
Standards-compliant calculators for electrical, HVAC, mechanical, and structural engineering. Free to use, with optional account for history & exports.
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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
Professional electrical engineering calculators for power systems, cable sizing, voltage drop, and short circuit analysis. Based on IEC and NEC standards.
Heating
Heating system design calculators for heat loss analysis, radiator sizing, boiler selection, and hydronic system design per EN 12831 standards.
Cooling
HVAC cooling calculators for load analysis, air conditioning sizing, and refrigeration system design. ASHRAE-compliant calculations with detailed results.
Ventilation
Ventilation system design tools for airflow calculation, duct sizing, pressure drop analysis, and fan selection per SMACNA and ASHRAE standards.
Plumbing
Plumbing engineering calculators for water supply design, drainage systems, pipe sizing, and pressure loss calculations based on international standards.
Fire Protection
Fire protection engineering calculators for sprinkler system design, hydrant sizing, and fire safety calculations per NFPA standards.
Mechanical
Mechanical engineering calculators for beam deflection, pump sizing, and equipment selection per ISO and ASME standards.
Utilities
General engineering utilities including unit converters, material property calculators, energy cost analysis, and sustainability assessment tools.
Why Engineers Choose Enginist
Professional-grade engineering tools with features you won't find elsewhere. Free to use, with optional account for history and exports.
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
Save calculations to your account. Review, compare, and reuse past results anytime across devices.
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