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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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