Developer tools / Electronics

Explore a Thevenin equivalent.

Adjust a source, two divider resistors, and a load. See the equivalent voltage, resistance, and load values update instantly in your browser.

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Loaded voltage divider

Try the defaults first, then change one value and watch how the circuit responds.

Positive DC source voltage

Between the source and output node

From the output node to ground

Connected across the output

Original circuit
Loaded voltage divider circuit A voltage source feeds resistor R1. At the output node, resistor R2 and load resistor RL connect to ground. + Vs 12 V R1 · 1 kΩ R2 2 kΩ RL 1 kΩ Vout
Equivalent seen by the load
Thevenin equivalent circuit The original source and divider are replaced by a Thevenin voltage source in series with resistance Rth, connected to load RL. + Rth Vth 8 V Rth 667 Ω RL Vload 4.8 V

Calculated values

Open-circuit Thevenin voltage (Vth)
8 V
Thevenin resistance (Rth)
666.7 Ω
Load voltage (Vload)
4.8 V
Load current (Iload)
4.8 mA

Calculations run locally in this browser. Circuit values are not sent to TeachyLeaf. This ideal DC model does not simulate component tolerances, power limits, frequency response, or nonlinear devices.

Learn how to derive the values in the Thevenin theorem lesson.