Enter the two known values out of three for resistance, capacitance and time

Any one of these three values may be the blank, unknown, value

Optionally, if you know the voltage, only fill ONE of the three possible boxes

Click on CALCULATE and the remaining value(s) will appear

Voltage is only calculated if a valid R-C time constant can be worked out

Click on the adjacent CLEAR to empty one value alone

Click on NEW FIGURES to start again

Click on the print icon for hard copy

Simply close this window when finished

A result of NaN in a field means that something other than a number was entered