Complete List of Excel Engineering Functions References and Examples
Excel Engineering Functions perform the most commonly used engineering calculations, many of which relate to Bessel Functions, Complex Numbers or converting between different bases.
Here’s a full list of BuiltIn Engineering Functions in Excel and their Descriptions below:
Click each of the function link to see detailed example.

Testing Numeric Values  
DELTA  Tests whether two supplied numbers are equal 
GESTEP  Tests whether a number is greater than a supplied threshold value 
Complex Numbers 

COMPLEX  Converts usersupplied real and imaginary coefficients into a complex number 
IMABS  Returns the absolute value (the modulus) of a complex number 
IMAGINARY  Returns the imaginary coefficient of a complex number 
IMARGUMENT  Returns the argument Θ (an angle expressed in radians) of a complex number 
IMCONJUGATE  Returns the complex conjugate of a complex number 
IMCOS  Returns the cosine of a complex number 
IMCOSH  Returns the hyperbolic cosine of a complex number (New in Excel 2013) 
IMCOT  Returns the cotangent of a complex number (New in Excel 2013) 
IMCSC  Returns the cosecant of a complex number (New in Excel 2013) 
IMCSCH  Returns the hyperbolic cosecant of a complex number (New in Excel 2013) 
IMDIV  Returns the quotient of two supplied complex numbers 
IMEXP  Returns the exponential of a complex number 
IMLN  Returns the natural logarithm of a complex number 
IMLOG10  Returns the base10 logarithm of a complex number 
IMLOG2  Returns the base2 logarithm of a complex number 
IMPOWER  Calculates a complex number raised to a supplied power 
IMPRODUCT  Returns the product of up to 255 supplied complex numbers 
IMREAL  Returns the real coefficient of a complex number 
IMSEC  Returns the secant of a complex number (New in Excel 2013) 
IMSECH  Returns the hyperbolic secant of a complex number (New in Excel 2013) 
IMSIN  Returns the sine of a complex number 
IMSINH  Returns the hyperbolic sine of a complex number (New in Excel 2013) 
IMSQRT  Returns the square root of a complex number 
IMSUB  Subtracts two complex numbers 
IMSUM  Calculates the sum of two complex numbers 
IMTAN  Returns the tangent of a complex number (New in Excel 2013) 