THE FEUTEX TOOLKIT

Capacitor Charge Sharing

Estimate final voltage and energy dissipated when charged capacitors are connected.

Electronics workspace● Runs in your browser

01 Your input

Capacitance oneFCapacitance twoFInitial voltage oneVInitial voltage twoV

02 Your result

View or copy raw result data

Result data

FormulaVf=(C1V1+C2V2)/(C1+C2); loss=½C1C2(V1−V2)²/(C1+C2)

Sources and model references

https://www.analog.com/media/en/training-seminars/tutorials/MT-031.pdf

Worked example

Inputs

Capacitance one: 0.001 F
Capacitance two: 0.001 F
Initial voltage one: 10 V
Initial voltage two: 0 V

Expected results

Final voltage: 5 V
Energy dissipated: 0.025 J

Load the example in the workspace to reproduce these results. Display rounding does not change the underlying calculation.

How to use this tool

Enter the labeled inputs in the indicated units.
Calculate and compare every output against the stated model assumptions.

Try this example

{
  "c1": 0.001,
  "c2": 0.001,
  "v1": 10,
  "v2": 0
}

Accuracy and scope

Ideal capacitors; connection resistance sets transient peak current but not final charge balance. Simplified analytical model; not a design recommendation or safety certification.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.