Voltage Divider Calculator
Voltage Divider Calculator lets you an unloaded divider outputs Vin × R2 / (R1+R2). Enter your own values or load the worked example.
- Copy or download the computed result
- Adjust input voltage
- See the processing method and limits
Method and calculation
An unloaded divider outputs Vin × R2 / (R1+R2).
Inputs and settings
Voltage Divider Calculator accepts Input voltage (minimum 0); Upper resistor (Ω) (minimum 0.000001); Lower resistor (Ω) (minimum 0.000001).
Worked example
Voltage Divider Calculator example — Input voltage: 12; Upper resistor (Ω): 10000; Lower resistor (Ω): 5000. Computed output: { "outputVolts": 4, "currentAmps": 0.0008 }
Output and limitations
Voltage Divider Calculator: Use finite inputs. Results use double-precision arithmetic.
Technical references: JavaScript numerical operations
Voltage Divider Calculator FAQs
Voltage Divider Calculator applies the following rule to your input: An unloaded divider outputs Vin × R2 / (R1+R2). The worked example on this page uses the same processor as the result button.
Voltage Divider Calculator has these boundaries: Use finite inputs. Results use double-precision arithmetic. Start by checking the input voltage field against the units or format shown.
Voltage Divider Calculator provides this sample: { "outputVolts": 4, "currentAmps": 0.0008 }. Use the sample button to reproduce it, then replace the inputs with your own values.