BER Calculator

BER Calculator is used to calculate the Bit Error Ratio (BER) for a transmission system under test given transmission rate, test period and number of received errors. It can also calculate a required test period for a BER test and the number of errors received in a period.

True BER is based on an infinite test time. Since this is impractical, a finite test period for a desired BER and confidence level is calculated using the binomial and Poisson distribution functions. The desired BER is chosen by the user and will be equal to or better than the true BER depending on the confidence level.  Percentage confidence levels can be selected for any user defined transmission rate. The calculated test period is displayed in a convenient, easy to read format, and the result is explained once it is calculated.

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Purchasing Information


  • Calculates BER given transmission rate, period and number of errors.
  • Calculates bit errors in period given BER, data rate and period.
  • Calculates test time given confidence level, BER, data rate and number errors.
  • Calculates Q-Factor for given BER rate.
  • Calculates DWDM aggregate power
  • Calculate DWDM and CWDM wavelength, frequency and channel number
  • Free 30 day evaluation period

System Requirements

  • Windows 98/ME/NT/XP/2000/Vista
  • 128MB RAM Minimum
  • 10 MB Hard Drive Space
You may also be interested in our Pocket BER Tester and Power Meter here