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⚡ Voltage Divider Calculator
Calculate output voltage, load effect, and power dissipation of a resistor divider
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Uin + R1 + R2 → Uout
Uin + Uout + R1 → R2
Uin + Uout + R2 → R1
Calculate output voltage
Load resistance R
L
(optional)
Ω — resistance of the circuit connected to Uout
Calculate
Results
Formulas
Uout = Uin × R2 / (R1 + R2)
Without load (R
L
= ∞)
Uout = Uin × R
parallel
/ (R1 + R
parallel
)
With load: R
parallel
= R2 × R
L
/ (R2 + R
L
)
P = Uin² / (R1 + R2)
Total power dissipated by the divider (without load)