حاسبة مقسّم الجهد.

Ideal resistors and a resistive load. Not a voltage regulator. Everything is calculated in your browser; nothing you type is uploaded.

Vout = Vin × R2 ÷ (R1 + R2), with R2 replaced by R2 ∥ R_load when a load is present. Currents and power in each resistor are shown.

12 V with R1 = 10 kΩ and R2 = 4.7 kΩ gives 3.8367 V; a 10 kΩ load pulls it down to 2.9072 V.