Calculate R/C for the charging voltage at a given time"
On this page you can calculate the values of a capacitor or resistor that are required to achieve a certain charging voltage on a capacitor at a given point in time.
Use the radio button to select whether the resistance or the capacitor should be calculated and enter the values. Then click on the 'Calculate' button.

\(\displaystyle R\)
Resistor
\(\displaystyle C\)
Capacitor
\(\displaystyle τ\)
Time constant
\(\displaystyle t\)
Loading time
\(\displaystyle U\)
Source voltage
\(\displaystyle U_C\)
Capacitor loading voltage
\(\displaystyle C = \frac{t·(1)}{R ·ln\left(1\frac{U_C}{U}\right)}\)
\(\displaystyle R= \frac{t·(1)}{C ·ln\left(1\frac{U_C}{U}\right)}\)
