Electrical Engineering Formulas

Browse electrical engineering formulas for circuits, voltage, current, resistance, electronics, and circuit theory.

Covered topics

Voltage and current

Resistance

Circuit relationships

Electronics fundamentals

How to use this page

Define current direction and voltage polarity before solving.
Check whether components are idealized or if course assumptions add constraints.
Keep units consistent across volts, amps, ohms, and derived quantities.

Common references

Start with these formulas

1 formulas in this collection

Relationship between voltage, current, and resistance

Formula

V = I R