# Excel DEC2BIN Function

Summary

The Excel DEC2BIN function converts a decimal number to its binary equivalent.

Purpose

Converts a decimal number to binary

Return value

Binary number

Syntax

=DEC2BIN (number, [places])

Arguments

**number**- The decimal number you want to convert to binary.**places**- [optional] Pads the resulting binary number with zeros up to the specified number of digits. If omitted returns the least number of characters required to represent the number.

Usage notes

The input must be a valid number within the range [ -512, 511 ].

### Errors

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