Calculate equivalent values for resistors, capacitors, and inductors in series or parallel. Essential for electronics design and education.
You might also find these calculators useful
Calculate voltage, current, resistance, and power
Calculate output voltage, resistor values, and power dissipation
Calculate momentum, mass, velocity, and collision analysis
Calculate rotational inertia for various shapes
Whether you're designing a circuit or solving homework problems, our Resistor Calculator instantly computes equivalent values for resistors, capacitors, and inductors. Simply select your component type, connection method, and enter your values.
In series circuits, components are connected end-to-end, so current flows through each one. In parallel circuits, components share the same two nodes, so voltage is the same across each. The formulas differ for each configuration and component type.
Key Formulas
Series: R_eq = R₁ + R₂ + ... | Parallel: 1/R_eq = 1/R₁ + 1/R₂ + ...Works with resistors, capacitors, and inductors.
Displays results in appropriate units (Ω, kΩ, MΩ, etc.).
See the complete calculation breakdown.
Find the right combination to achieve target values.
Learn and verify series/parallel calculations.
Calculate expected values for circuit testing.
Combine available parts to get needed values.
Capacitors store charge differently than resistors dissipate energy. In parallel, capacitors combine their charge storage (add directly). In series, the effective capacitance decreases because charge must be shared.