Convert signed integers exactly between binary, octal, decimal and hexadecimal without floating-point precision loss.
Printed from Calxy · https://www.calxy.net/math/binary-hex-calculator
Signed integers; no fractional digits or two’s-complement interpretation.
Decimal integer
255
Negative results use a minus sign, not a fixed-width bit pattern. Arbitrary-precision conversion is limited to 1,024 input digits for responsiveness.
Read each digit by positional value in the selected base.
Convert the exact integer using repeated base division; no floating-point rounding is used.
Each digit contributes its value multiplied by a power of the input base. Repeated division expresses the same integer in another base.
Hexadecimal FF represents 15 × 16 + 15 = 255, equivalent to binary 11111111 and octal 377.
No. Negative values retain a minus sign. Fixed-width machine encodings require a bit width and use different rules.
Last updated . Results are estimates for informational purposes only.