Binary Converter
Convert numbers between decimal and binary formats for mathematics, computing, and programming work.
How to use this calculator
Enter the source value and select the correct source and target units. The safest check is to convert a familiar value first, then confirm that the direction of the conversion is the one you intended.
Formula
A binary number represents powers of 2; decimal = Ξ£(bit Γ 2^position).
Conversion check
For conversions, keep the source and target units visible when copying the answer into another calculation. If the result looks unexpectedly large or small, check the conversion direction and the unit labels before assuming the number is wrong.