Wheatstone Bridge Calculator
Enter three known bridge-arm resistances, choose the unknown arm, and optionally enter supply voltage to see the ideal balance relationship.
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Series circuits, parallel circuits, shunts, and component calculation workflows.
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RLC Resonance Calculator
Enter inductance, capacitance, and series resistance to calculate the ideal resonant frequency and first-order series-RLC quality metrics.
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RC Time Constant Calculator
Enter resistance, capacitance, mode, and target percentage to calculate the ideal first-order RC time constant and exponential target time.
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LED Resistor Calculator
Enter supply voltage, LED forward voltage, target current, and series LED count to estimate the ideal current-limiting resistor and a rounded-up common resistor candidate.
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Impedance Calculator
Use this AC impedance workflow when resistance and reactance values are already known and you need the magnitude and phase angle.
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Current Divider Calculator
Enter total current and branch resistance values to estimate ideal current division in a fixed-resistance parallel circuit.
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Capacitor Code Calculator
Use this component-code workflow to decode common three-digit capacitor markings. Confirm the full marking and component rating before use.
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Voltage Divider Calculator
Enter source voltage, top resistance, bottom resistance, and optional load resistance to estimate voltage-divider output and resistor power.
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Resistor Color Code Calculator
Select the first digit, second digit, multiplier, and tolerance bands to estimate nominal resistor value and tolerance range.
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Series Circuit Calculator
Use this simple fixed-resistance, DC-style Ohm law series circuit calculator for concept checks, worksheets, and preliminary component arithmetic. It is not AC impedance analysis, not component selection, and not an installation or code-compliance result.
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Shunt Resistor Calculator
Use this component calculator to screen meter-shunt and current-sense resistor values for measurement concepts before checking power rating, tolerance, heating, calibration, isolation, and instrument design. It is not a resistor selection, not a safety approval, and not code-compliance.
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Parallel Circuit Calculator
Use this simple fixed-resistance, DC-style Ohm law parallel circuit calculator for concept checks, worksheets, and preliminary component arithmetic. It is not AC impedance analysis, not component selection, and not an installation or code-compliance result.
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