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Calculate erfc(x)    
x        
erfc(x)   
   

Calculate erfc^-1(x)    
erfc(x)          
x    
   

erfc.net

erfc.net is a utility for calculating the complimentary error function (erfc) or the inverse complimentary error function (erfc^-1).

Erfc is calculated with an error of less than 1x10⁷ by using Chebyshev's approximation (see Numerical Recipes in C p. 176)

Some Properties of the error function

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  • erf identity
  • erfc identity
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• p  =   0.47047
• a₁ =  0.3480242
• a₂ = -0.0958798
• a₃ =  0.7478556

Answers provided by this service may not be relevant to the materials presented in this website.

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