Physics

Voltage Divider Calculator

Find the output voltage of a two-resistor divider.

Calculated Output

Output voltage (V) 8

Formula: Vout = Vin × R2 ÷ (R1 + R2)

Step-by-Step Breakdown

1. Values used:

2. Input voltage = 12 V

3. R1 (top) = 1,000 Ω

4. R2 (bottom) = 2,000 Ω

6. Output voltage = 8V

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The math behind it

Vout = Vin × R2 ÷ (R1 + R2), measured across R2.

12 V, 1k/2k → 8 V.

Load effect?

A connected load lowers Vout; keep load resistance ≫ R2.