Hex To Decimal
Convert a hexadecimal value such as FF into its decimal integer equivalent.
How to use the Hex To Decimal
What does the Hex To Decimal do?
Convert a hexadecimal value such as FF into its decimal integer equivalent; It applies this page-specific rule: hexadecimal groups four binary bits into each digit.
Which inputs does this tool use?
To convert a hexadecimal value such as ff into its decimal integer equivalent, enter Hexadecimal value, Signed bit width, Decimal result; keep every value in the same example; where available, choose between 8 bits, 16 bits, 32 bits, 64 bits to match the required format; select Convert hexadecimal to decimal when the values are ready; Start with a familiar case covered by this rule - Signed interpretation therefore requires a bit width - so the expected result can confirm the settings.
How should the tool result be read?
For a result intended to convert a hexadecimal value such as ff into its decimal integer equivalent, signed interpretation therefore requires a bit width; read decimal result together with the original hexadecimal value rather than as an isolated answer, and confirm that its units or structure match the intended use.
Do I need to type 0x?
When the goal is to convert a hexadecimal value such as ff into its decimal integer equivalent, no.
Why can FF mean 255 or -1?
When using the page to convert a hexadecimal value such as ff into its decimal integer equivalent, the digits are the same; the interpretation changes when an 8-bit signed representation is selected.
Limits and accuracy
When using this tool to convert a hexadecimal value such as ff into its decimal integer equivalent, the conversion uses arbitrary-precision integers and does not lose accuracy on large hexadecimal values; check the result in its intended destination before relying on it for important work; keep hexadecimal value until the output has been checked in its intended destination.
Unsigned and signed hexadecimal
Hexadecimal groups four binary bits into each digit. FF is 255 when treated as unsigned. The same 8-bit pattern is -1 when interpreted as signed two’s complement.
Signed interpretation therefore requires a bit width. A value that does not fit the selected width is rejected instead of being truncated.
The conversion uses arbitrary-precision integers and does not lose accuracy on large hexadecimal values.
Frequently asked questions
Do I need to type 0x?
No. Both FF and 0xFF are accepted.
Why can FF mean 255 or -1?
The digits are the same; the interpretation changes when an 8-bit signed representation is selected.
Are lowercase letters accepted?
Yes. A through F are case-insensitive.