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eng.Thevenin-Norton-equiv Calculator
Calculates the Thévenin equivalent (Vth, Rth) and Norton equivalent (In, Rn) of a linear circuit for simplified load analysis. Thévenin's theorem reduces any linear circuit to a single voltage source and series resistance — it simplifies analysis when the load changes repeatedly.
Inputs
V1 V
Reference formula or conversion factor shown for context.
V2 V
Reference formula or conversion factor shown for context.
R1 Ohm
Reference formula or conversion factor shown for context.
R2 Ohm
Reference formula or conversion factor shown for context.
R Load Ohm
Opposition to current flow (Ω). V = IR. Resistors in series add; in parallel their reciprocals add.
Results
Thevenin voltage Vth (V)
Electric potential difference between the two terminals (V). In AC systems, quoted as RMS — 230 V mains has a peak of ~325 V.
Thevenin resistance Rth (Ω)
Opposition to current flow (Ω). Ohm's Law: V = IR. Lower resistance means more current for the same voltage.
Norton current In (A)
Electric charge flow rate (A). Governs wire sizing — too much current causes dangerous heating. Fuses protect circuits from overcurrent.
load current IL (mA)
Electric charge flow rate (A). Governs wire sizing — too much current causes dangerous heating. Fuses protect circuits from overcurrent.
load power (mW)
Reference formula or conversion factor shown for context.