Use this electronics calculation for a first-pass component, converter, signal, motor, or sensor estimate when the stated operating conditions and units match the device data.

Resistance R1

Required number input.

Resistance R2

Required number input.

Compute the Thevenin resistance in ohms of a resistive divider seen from its output. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Thevenin resistance

The resulting thevenin resistance returned as a number.

• A Thévenin equivalent applies only at the chosen terminals and under the assumed linear operating conditions. Frequency-dependent, nonlinear, time-varying, and dependent-source circuits require the appropriate impedance or small-signal treatment.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check the result against the current datasheet and worst-case operating corners, then verify the circuit or measurement with simulation and bench testing where failure matters.

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