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Free engineering calculators for electrical circuits, Ohm's law, voltage dividers, and power calculations. Essential tools for engineers and students.
Calculate voltage, current, resistance, and power
Calculate airflow in CFM for HVAC and ventilation
Calculate horsepower from torque, RPM, or force
Calculate torque, force, distance, and power conversion
Calculate volumetric and mass flow rates for pipes and ducts
Calculate beam deflection, bending moment, shear force, and stress
Calculate power factor, real, reactive, and apparent power
Calculate mechanical advantage, force, and speed for pulley systems
Calculate belt length for open and crossed belt drives
Calculate spring constant, force, displacement using Hooke's Law
Professional-grade engineering calculators for electrical, mechanical, and civil engineering applications. Whether you're a student learning fundamentals or a practicing engineer, our tools provide accurate calculations with proper unit handling.
Calculate resistance, power, voltage, current using Ohm's law and related formulas.
Compute torque, stress, strain, fluid dynamics, and thermodynamic properties.
Calculate beam loads, concrete mixtures, structural requirements, and more.
Seamlessly convert between metric and imperial units in all calculations.
Calculations follow industry-standard formulas and safety factors.
Export calculations for project documentation and engineering reports.
Select the engineering discipline and specific calculator for your needs.
Enter all known parameters with proper units.
Review calculated results and verify they make physical sense.
Check the formulas used to ensure they match your application.
Apply appropriate safety factors for real-world applications.
Calculate component values, power dissipation, and electrical properties for electronic circuits.
Determine loads, stresses, and deflections for beams, columns, and structures.
Size heating and cooling systems, calculate heat transfer and airflow requirements.
Verify calculations for coursework, capstone projects, and engineering exams.
Yes, for real-world applications always apply appropriate safety factors per relevant codes and standards. Our calculators provide theoretical values that should be adjusted for practical use.