About this tool: RC Circuit Calculator
Calculate the RC time constant, cutoff frequency, charging and discharging voltage.
Capacitance is entered in microfarads, resistance in ohms and elapsed time in milliseconds. The time constant is RC: charging reaches about 63.2% after one time constant. The curves assume an ideal capacitor and resistor, a voltage step and zero initial charge.
How the calculation works
Worked example
| Resistance, Ω | 1000 |
| Capacitance, µF | 100 |
| Voltage, V | 5 |
| Elapsed time, ms | 100 |
τ = 0.1 s; Vc(100 ms) ≈ 3.16060279414 V; fc ≈ 1.59154943092 Hz
Questions and answers
What does this tool do?
Calculate the RC time constant, cutoff frequency, charging and discharging voltage. Capacitance is entered in microfarads, resistance in ohms and elapsed time in milliseconds. The time constant is RC: charging reaches about 63.2% after one time constant. The curves assume an ideal capacitor and resistor, a voltage step and zero initial charge.
What affects precision and input format?
Floating-point results are rounded for display. Keep the units shown in the input labels; decimal points and decimal commas are accepted.
Where are the calculations performed?
The calculation runs in your browser. You can use the tool without installing software.
Asted Cloud
Comments (0)
Share your thoughts — please be polite and stay on topic.
Log in to comment