Number Base Calculator

Convert values between binary (BIN), octal (OCT), decimal (DEC) and hexadecimal (HEX), or calculate with two numbers in independently selected bases. Built for adults who program, teach, or study technical subjects. Use addition, subtraction, multiplication, integer division and remainder. During division, the quotient is truncated toward zero and the remainder keeps the sign of the first number. For example, −7 ÷ 3 gives quotient −2 and remainder −1. REM returns that same signed remainder; it is not Euclidean modulo. Values are exact integers with up to 4096 bits of magnitude (|n| ≤ 2^4096 − 1). Negative values use a minus sign in every base (−255 DEC is −FF HEX); this is sign-and-magnitude notation, not two's complement. Fractions, floating-point arithmetic, bitwise operations and two's-complement views are not supported. Values beyond the limit are rejected without rounding or truncation. Features: • Convert one value across all four bases. • Calculate with independently chosen bases for A and B. • View quotient and remainder together for division. • Save and restore up to 50 recent successful entries on your device. • Copy a complete number or paste one explicitly. • Expand long values to read or copy the full number. • Choose light, dark or system theme, digit grouping and app language. Calculations, history and preferences stay on your device. Ads are provided through Google Mobile Ads; privacy choices are managed with Google's UMP. See the privacy policy for details. Ads require an internet connection; the calculator itself works locally. Contact: [email protected]

First release: convert and calculate whole numbers in four bases, with local history and full-number copy.