Engineering Calculators

These free electrical engineering calculators are built for practicing engineers, electrical contractors, solar installers, and engineering students who need quick, reliable calculations in the field or at the desk. Each tool follows established industry standards including the National Electrical Code (NEC), the Canadian Electrical Code (CEC), and standard engineering formulas used in power systems design.

Every calculator is designed and maintained by Ali Mazloum, P.Eng. (AB, NS), P.E. (TX), PMP — a licensed professional electrical engineer with hands-on experience in commercial and industrial electrical construction, renewable energy systems, and project management. The tools are free to use and require no registration or downloads.

Select a calculator below to get started. Each tool includes input validation, real-time results, the underlying formulas, and educational content explaining the engineering theory.

Disclaimer: These calculators are intended for educational and preliminary estimation purposes only. Results should not be used as a substitute for professional engineering design. Always consult a licensed electrical engineer before making decisions that affect safety, code compliance, or construction.