Loaded Voltage Divider Calculator

How Loaded Voltage Divider works

The calculation uses Vout = Vin × (Rbottom || Rload) ÷ (Rtop + Rbottom || Rload). Loaded Voltage Divider uses Source voltage, Upper resistance, Lower resistance, Load resistance to report Loaded output voltage. For output voltage, use Voltage Divider Calculator.

With the loaded values, loaded output voltage evaluates to 3.31 V. Change only the quantity being investigated.

Inputs for Loaded Voltage Divider

Source voltage, Upper resistance, Lower resistance, and Load resistance belong to Loaded Voltage Divider. Keep source units with source voltage.

The preset case is instructional rather than prescriptive. Enter the applicable electrical data.

Source voltage

Example entry: 12 V.

Upper resistance

Example entry: 10000 Ω.

Lower resistance

Example entry: 4700 Ω.

Load resistance

Example entry: 20000 Ω.

Reading the Loaded Voltage Divider result

This output represents Loaded Voltage Divider.

Finish the selection with standard sizes, operating limits, and transient review. Compare this result with Ohm's Law Calculator when voltage is also needed.

Measurement and units

Use measured values and keep prefixes such as milli, kilo, and mega consistent before calculating. Check prefixes on source voltage. If the next question concerns conductor resistance, open Conductor Resistance Calculator.

Use the same unit basis and observation location in alternate cases.

Limits of this calculation

The load is treated as a fixed resistance across the lower divider resistor.

A complete system can contain effects that this equation does not represent. Unentered effects remain outside Loaded Voltage Divider.

A useful Loaded Voltage Divider comparison

Record loaded output voltage before testing a different source voltage value.

Document the alternate source voltage source. Use Source Internal Resistance Calculator as the follow-up for internal resistance.

Questions about Loaded Voltage Divider