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Resistor calculator

Series, parallel and voltage dividers.

Two-resistor divider

Enter the three known values. The selected field displays the answer.

V
V

Circuit and result

VinR1R2Vout
Vout2 V

Divider ratio = 0.4 · I = 0.0002 A

Vout = Vin × R2 / (R1 + R2)R1 connects Vin to Vout. R2 connects Vout to ground. Assumes an unloaded output.