Bases 2–36 · exact integers
Convert binary to hexadecimal exactly
Translate a complete signed base-2 integer into uppercase hexadecimal without grouping assumptions, padding, or truncated machine words.
Binary to hexadecimal worked example
Why 11111111₂ becomes FF₁₆
- Because 16 = 2⁴, split the binary digits from the right into groups of four.
- Map each group directly: 1111₂ is F₁₆, so 1111 1111 becomes F F.
- If the left group is short, add conceptual leading zeros for grouping: 1101100 becomes 0110 1100, then 6C. The canonical result omits that padding.
This is integer notation, not text bytes or a fixed-width bit pattern. A negative input keeps its minus sign; without a word width the result is not two’s-complement.
Exact default exampleBinary: 11111111
Groups: 1111 | 1111
Hexadecimal: FF
Live conversion
Integer base converter
Up to 4096 ASCII characters; optional leading minus sign.
Enter a whole base from 2 through 36.
Quick base pairs
Switch the source and target while preserving the current valid integer.
Integer notation only: no fractions, exponents, 0x/0b prefixes, separators, whitespace, text encoding, IEEE-754 interpretation, or symbolic expressions.
Exact result
Base 2 to base 16
- Canonical source
- 11111111
- Source digits
- 8
The same integer in common bases
Value catalog
Common decimal values across five bases
Open a finite, indexable reference page for each curated decimal anchor. Calculator state itself never enters the URL.