The DEC2BIN function in Microsoft Excel is an Engineering function, and its purpose is to convert a decimal number to binary. The formula for the DEC2BIN is DEC2BIN( Number, [Places]).

Warnings Excel will only produce binary numbers with up to 10 bits. This means that it can only convert decimal numbers greater than -513 and less than 512.

How to convert time values into decimal values in Excel Internally, Excel stores the time as a decimal value. The quickest way to see that time value is to change the format.