Voltage divider — common cases, pre-computed
The output voltage for the most common Vin / R1 / R2 combinations, computed as Vout = Vin · R2 / (R1 + R2) for an ideal, unloaded divider. Need a different value? Open the interactive calculator.
5.00 V input
9.00 V input
12.0 V input
3.30 V input
Values assume an ideal, unloaded divider — a connected load draws current and lowers Vout.