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  • Base 64 encoding and decoding

    The calculators encode string to base64 string and decode back to original string. Special characters (+/) , generally produced by base64 algorithm, can be replaced by the data provided in additional parameter.

  • Binary Coded Decimal (BCD)

    This online calculator converts decimal number to binary code in BCD notation and vice versa

  • Caesar cipher

    Calculator encrypts entered text by using Caesar cipher. Non-alphabetic symbols (digits, whitespaces, etc.) are not transformed.

  • Conversion between any bases

    This calculator converts number from one numeral system to another, given both system's bases

  • Conversion from decimal numeral system

    This calculator converts given decimal value to other positional numeral system

Binary, inverse and complement codes

Binary, one's complement (inverse) and two's complement codes (calculator was created by user's request)

PLANETCALC, Binary, inverse and complement codes

Binary, inverse and complement codes

  • Conversion of fractional numbers between numeral systems

    This online calculator helps to convert fractional number in one numeral system to fractional number in other numeral system.

  • Count the number of words

    The calculator counts word number in a given text. It can be used for rough calculation of translation cost. Can be used for word number calculation in software resources.

  • Email extractor

    This online calculator parses emails from block of text using regular expression

  • GET request string parser

    This parser break GET request string to the parameter-value pairs and decodes URL-encoded sequences, if needed

  • Hill cipher

    This calculator uses Hill cipher to encrypt/decrypt a block of text

  • Huffman coding

    This online calculator generates Huffman encoding for given frequency of occurrence of symbols.

Simple math in any numeral system

This online calculator supports simple math (addition, subtraction, division, multiplication and power) for numbers expressed in any numeral system - binary, octal, hexadecimal, from the base 2 to base 36

PLANETCALC, Simple math in any numeral system

Simple math in any numeral system

Numeral system base

Digits after the decimal point: 2
  • LL1 grammar analysis. Yet another top-down parser generator.

    The calculator checks LL1 grammar correctness, parses a text using the grammar, shows FIRST, FOLLOW and FIRST PLUS sets, parsing tree and gives PLANETCALC parsing code.

  • Playfair cipher

    This online calculator encrypts and decrypts a message given Playfair cipher keyword. Non-alphabetic symbols (digits, whitespaces, etc.) are ignored.

  • Regular expression tester

    This online calculator allows user to experiment with regular expressions.

  • Shannon Entropy

    This online calculator computes Shannon entropy for a given event probability table and for a given message

  • Symbol frequencies table

    This online calculator builds symbol frequency table for a given message

  • VARIANT DATE to datetime string

    This online calculator converts VARIANT DATE (double) value to datetime string.

  • Vigenère cipher

    Calculator encrypts entered text by using Vigenère cipher. Non-alphabetic symbols (digits, whitespaces, etc.) are not transformed.

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