Modern Numeral Systems
Hexadecimal Calculator
A complete toolkit for base-16 numbers. Convert, calculate, and transform text to hex for programming and computer science tasks.
Octal Converter
A complete tool for the base-8 numeral system, widely used in computing and digital systems before hexadecimal became common.
Duodecimal Converter
Work with the base-12 system, also known as dozenal. A powerful tool for exploring this elegant and highly divisible number base.
Sexagesimal Converter
Convert numbers to and from the base-60 system, essential for time (hours, minutes, seconds), angles, and geographic coordinates.
Base58 (Bitcoin) Converter
A converter for Base58, the encoding scheme used for Bitcoin addresses and other cryptocurrencies to prevent transcription errors.
Base32 Converter
Encode and decode data using Base32, supporting RFC 4648 and Crockford alphabets. Essential for data transmission.
Ascii85 (Base-85) Converter
Convert data using Ascii85, a space-efficient binary-to-text encoding used in formats like PostScript and PDF.
Quinary & Senary Converter
Convert between base-5 (Quinary) and base-6 (Senary) numeral systems. A tool for exploring less common but foundational number bases.
Historic Numeral Systems
Egyptian Hieroglyphs
Travel back in time to ancient Egypt. Convert numbers to hieroglyphic symbols and perform basic arithmetic as the scribes did.
Mayan Numerals
Discover the elegant vigesimal (base-20) system of the ancient Maya civilization, featuring shells, dots, and bars.
Greek Numerals
Explore the alphabetic system of ancient Greece. Convert numbers, perform calculations, and learn about the Attic calendar.
Babylonian Numerals
Convert to the sexagesimal (base-60) cuneiform system of ancient Mesopotamia, a precursor to modern timekeeping.
Hebrew Numerals
Explore the Gematria system where Hebrew letters are assigned numerical values for traditional and mystical use.
Armenian Numerals
A converter for the ancient Armenian alphabetic numeral system, directly derived from the Greek model.
Thai Numerals
A simple tool to convert between Arabic and traditional Thai numerals (เลขไทย), used in Thailand for centuries.
Phoenician Numerals
Convert numbers to the script used by the ancient maritime traders of Phoenicia, the basis for many modern alphabets.
Esoteric & Mathematical Systems
Factorial System (Factoradic)
Explore the unique Factoradic system, where each digit's place value is a factorial. Useful in combinatorics.
Balanced Ternary Converter
Work with the base-3 system using digits {-1, 0, 1}. This unique system offers elegant arithmetic properties.
Negabinary (Base -2) Converter
Convert numbers to the base -2 system, which can represent all integers, positive and negative, without a sign bit.
General Information
About Numeral Systems
Learn about the history and theory behind different counting methods, from base-10 to base-60 and beyond.
CountingMethods.com
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