Circuit Calculator Pro

Solve electronics formulas fast with 13 calculators, project history, and a circuit builder. Upgrade once to unlock advanced tools and remove ads.

Circuit Calculator Pro is a practical electronics toolkit for students, makers, and engineers.

Use 13 calculators in one app: • Ohm's Law (V, I, R, P) • Resistors Series/Parallel • Voltage Divider • LED Resistor • RC Time Constant • Capacitors Series/Parallel • Inductors Series/Parallel • Reactance (Xc/Xl) • Power & Energy • Wire Voltage Drop • LED String • Loaded Divider • E-Series Finder

Built-in workflow tools: • Save recent calculations • Organize results into projects and folders • Copy/share results instantly • Export to PDF and image (Premium)

Reference library included: • Resistor color code guide • Capacitor code guide • Formula cheat sheets • Electronics glossary

Circuit Builder (Premium): • Drag-and-drop components • Connect nodes on a grid canvas • Run circuit analysis and view node voltages/currents • Save and reopen circuit files

Free plan includes core calculators with ads. Premium is a one-time purchase that unlocks advanced calculators, circuit builder access, expanded limits, and ad removal.