Voltage divider calculator
Interactive engineering and procurement calculator. Instant client-side computation with no sign-up.
Calculate Vout
Results
Output voltage (Vout)
Vout = Vin × R2 / (R1 + R2)
2.5 V
Divider current (I)
I = Vin / (R1 + R2)
0.0025 A
R2 voltage share
Share of Vin dropped across R2
50 %
About this divider
A resistive divider attenuates Vin by the ratio R2 / (R1 + R2). Use it to bias amplifier inputs, scale an ADC signal or set a reference. The divider loads the source with R1 + R2, so keep the divider current well above the load you are feeding.
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