The Excel ERFC function calculates the Complementary Error Function, integrated between a supplied lower limit and infinity.

The Complementary Error Function is equal to 1 -ERF (i.e. 1 – Error Function), and is given by the equation:

**Syntax**: =ERFC(x)

The ERFC function syntax has the following arguments:

**X**Required. The lower bound for integrating ERFC.

**Example**: Let’s look at some Excel ERFC function examples and explore how to use the ERFC function as a worksheet function in Microsoft Excel:

**Syntax**: =ERFC(A2)

**Result**:

Based on the Excel spreadsheet above, the following ERFC examples would return:

**Syntax**: =ERFC(A3)**Result**: 0.479500122

**Syntax**: =ERFC(A4)**Result**: 1.842700793

**Syntax**: =ERFC(A5)**Result**: 0.157299207

**Syntax**: =ERFC(A6)**Result**: 0.977435425

**Syntax**: =ERFC(A7)**Result**: 0.033894854

**Syntax**: =ERFC(A8)**Result**: 0.004677735

**Syntax**: =ERFC(A9)**Result**: 2.20905E-05

**Syntax**: =ERFC(A10)**Result**: 0.000406952

**Syntax**: =ERFC(A11)**Result**: 0.943628022

**Syntax**: =ERFC(A12)**Result**: 1.99997791

**Syntax**: =ERFC(A13)**Result**: 1.999999985

**Note**:

- If
**x**is a non-numeric value, the function returns the*#VALUE!*error value. - The function returns the
*#NUM!*error if one or both of the arguments are negative in Excel 2007 or earlier versions of Excel.