All online calculators

  • Squarefree polynomial factorization

    The calculator extracts square factors from the input polynomial.

  • Standard Galactic Alphabet decoder

    This online calculator can decode message written with standard galactic alphabet symbols

  • Strength of alcoholic cocktail

    Calculates volume fraction of alcohol in a beverage made of 3 other beverages.

  • Student t-distribution

    Calculates cumulative distribution function value and probability density function value for Student t-distribution. Quantile calculator evaluates Student quantiles for given probability and specified number of degrees of freedom.

  • Substitution cipher breaker
  • Substitution Cipher Tool

    The tool to encrypt/decrypt messages with simple substitution cipher given as key. It is also useful for manual cryptanalysis of substitution cipher - when you have message written in English alphabet partially decrypted with automatic tool and want to tweak the key.

  • Sun position at a given date. Azimuth and elevation table.

    Calculation of azimuth and elevation of the sun above the horizon for a given position and time. Table with one hour increments.

  • Sunrise and sunset calculator

    Sunrise/Sunset calculation for given latitude and longitude or for given city. Source: Almanac for Computers, 1990 published by Nautical Almanac Office United States Naval Observatory Washington, DC 20392

  • Sunrise and sunset time

    This online calculator is intended for sunrise and sunset time calculation for given place and date. The calculator algorithm is obtained from the great book of Oliver Montenbruck and Thomas Pfleger "Astronomy on the Personal Computer".

  • Surface area of a cube
  • Surface tension. Weight and volume of the drop of liquid

    This online calculator calculates the weight and the volume of the drop given the surface tension, diameter of the capillary tube, and density of the liquid

  • Symbol frequencies table

    This online calculator builds symbol frequency table for a given message

  • Tank volume

    Calculator computes tank volume given its length, diameter and walls depth. Created by user's request.

  • Tank Volume Calculators

    Use one of these to determine your tank's volume.

  • Tax deductions from personal income tax
  • Team combinations with conditions like team roles and limits

    This online calculator generates all possible combinations of 11 from 22 using limiting conditions like team roles and limits

  • Telecommunications traffic, Erlang

    The calculator gives telecom traffic in Erlang for given time span and total call duration.

  • Temperature scales

    Conversion between different temperature scales

  • Text fitness

    This online calculator computes text "fitness". That is, how similar the given text to other texts written in English language.

  • Text fitness (version 2)

    This online calculator calculates measure known as fitness score, of how given text is similar to a typical English text. It uses frequencies of unigrams, bigrams and trigrams to calculate fitness score. The reference frequencies are calculated from Leipzig Corpora Collection and can be downloaded from The less value you get, the better.