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DC CIRCUIT ANALYSIS CALCULATOR

Nodal analysis, resistor networks, Ohm's law, and RC circuits.

Use ideal DC circuit models for Ohm's law, series and parallel resistors, voltage dividers, RC transients, and a two-node nodal-analysis calculator that shows the conductance-matrix idea behind KCL.

CIRCUIT WORKSPACE

Ohm's law

IDEAL DC MODEL

Leave exactly one field blank to solve V = I × R. This mode is useful for basic DC resistor questions and power checks.

FORMULAS & WORKFLOWS

What this circuit calculator can solve

Ohm's lawV = I × R
Series resistanceRtotal = R1 + R2 + ...
Parallel resistance1/Rtotal = Σ(1/R)
Voltage dividerVout = Vin × R2/(R1 + R2)
RC time constantτ = R × C
Nodal analysisG · V = I

WHEN TO USE NODAL ANALYSIS

Use the nodal-analysis calculator when a circuit has current injections, multiple resistor paths to ground, and a resistor between two unknown node voltages. The calculator builds the coefficient matrix from conductances, then solves the node-voltage system.

ABOUT THIS TOOL

DC Circuit Analysis Lab

Calculate ideal DC resistor circuits with Ohm's law, resistor networks, voltage dividers, RC charge or discharge, and a two-node nodal-analysis solver that explains conductance matrices and current injections.

  • Solve Ohm's law questions by leaving voltage, current, or resistance blank
  • Calculate total resistance and optional current for series or parallel resistor networks
  • Find voltage-divider output, RC transient voltage, and two-node nodal-analysis voltages
  • Build a conductance matrix from KCL and solve node-voltage equations

KEY FUNCTIONS

Ohm's law with voltage, current, resistance, and power contextSeries and parallel resistor-network calculationsVoltage divider formula using top and bottom resistorsRC charge and discharge with ideal time-constant assumptionsTwo-node nodal-analysis model with R1, R2, R12, I1, and I2 inputsConductance-matrix explanation and branch-current interpretationGuide link for KCL, node voltages, and coefficient-matrix setup
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LEARN THE METHOD

Guides for this calculator workflow

GUIDETwo-node nodal analysisSet up KCL equations, conductance terms, coefficient matrices, node voltages, and branch currents for a two-node resistor circuit.Read →GUIDEEngineering unit conversionUnderstand engineering conversions for pressure, force, torque, energy, power, density, frequency, and scientific notation values.Read →GUIDEMatrix methods for linear systemsCompare Gaussian elimination, RREF, inverse, rank, and Cramer’s rule for linear systems.Read →

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