RC Rise Time Calculator

This tool calculates the Rise Time of a simple RC low pass filter network.


  • Resistance R (units: milliOhm/Ohm/kilOhm/megOhm)
  • Capacitance C (units: Farad/milliFarad/microFarad/nanoFarad)




tr = 2.197*RC

Rise time in this formula represents the time it takes to get from 10% to 90%.

Series RC capacitor voltage

Example Calculation

An RC low pass filter with R = 1 ohm and C = 1 microfarad has a rise time of 2.2 microseconds.

Related Calculators


[1] Rise Time of a Single Stage Low Pass RC Network on Wikipedia