The Microsoft Excel BIN2OCT function converts a binary number to an octal number. The BIN2OCT function is a built-in function in Excel that is categorized as an *Engineering Function*. It can be used as a worksheet function (WS) in Excel. As a worksheet function, the BIN2OCT function can be entered as part of a formula in a cell of a worksheet.

**Syntax**: BIN2OCT(number, [places])

The BIN2OCT function syntax has the following arguments:

**Number**Required. The binary number you want to convert. Number cannot contain more than 10 characters (10 bits). The most significant bit of number is the sign bit. The remaining 9 bits are magnitude bits. Negative numbers are represented using two’s-complement notation.-
**Places**Optional. The number of characters to use. If places is omitted, BIN2OCT uses the minimum number of characters necessary. Places is useful for padding the return value with leading 0s (zeros).

**Example**: Let’s look at some Excel BIN2OCT function examples and explore how to use the BIN2OCT function as a worksheet function in Microsoft Excel:

**Syntax**: =BIN2OCT(A2)

**Result**:

Based on the Excel spreadsheet above, the following BIN2OCT examples would return:

**Syntax**: =BIN2OCT(A3)**Result**: 24

**Syntax**: =BIN2OCT(A4)**Result**: 4

**Syntax**: =BIN2OCT(A5)**Result**: 7

**Syntax**: =BIN2OCT(A6)**Result**: 2

**Syntax**: =BIN2OCT(A7)**Result**: 35

**Syntax**: =BIN2OCT(A8)**Result**: 144

**Syntax**: =BIN2OCT(A9)**Result**: #NUM!

**Syntax**: =BIN2OCT(A10)**Result**: #NUM!

**Syntax**: =BIN2OCT(A11,B11)**Result**: 0077

**Syntax**: =BIN2OCT(A12,B12)**Result**: 00077

**Syntax**: =BIN2OCT(A13,B13)**Result**: 000077

**Syntax**: =BIN2OCT(A14,B14)**Result**: 011

**Syntax**: =BIN2OCT(A15,B15)**Result**: #NUM!

**Note**:

- Numbers can be given as argument to the function directly without quotes or cell reference in excel.
- The function doesn’t consider the [places] number in case of a negative decimal number.
- If the input [places] number is not an integer, it is truncated by the function.
- The input number must be a valid binary numeric number.
- If the input number has less than 10 digits, the function takes 0s to the left of the number to complete its 10 character binary value.
- The function returns the #VALUE! Error
- If the input number is text or non-numeric.
- If the input [places] number is text or non-numeric.

- The function returns the #NUM! Error
- If the input characters exceed by 10 digits.
- If the input number is not a valid binary expression.
- If the input number have fraction part or decimal part for example: 010111.101