A client is wondering if it is possible to force Excel to work in other numerical bases. I am trying to perform calculations on binary and/ or hexadecimal numbers. I know of the DEC2HEX, DEC2BIN and similar conversion functions, but I am trying tomanipulate the converted data. For example, I want to enter a decimal value, convert it to binary and bit test the binary value. Are any third party add-ins available that might enable this type of function?