Tool / Calculator |
Description |

Percentage Calculator |
Enter two numbers, and see not only the percentages, but **how** they are calculated. |

Binary, Decimal, Hexadecimal Converter |
Convert between Binary, Decimal and Hexadecimal. Can handle fractions and negatives. |

Prime Factorization Tool |
Want to know if a number is Prime? Or if not, which prime numbers are it's factors? |

Straight Line Graph Calculator |
If you have two points and need to know the straight line formula (y=mx+b) that connects them. |

Scientific Calculator |
We think this is the best calculator around, because it will accept formulas such as (3+2/9)^2 or sin(1/5) |

Unit Conversion Tool |
A neat yet powerful unit conversion tool. Can convert lengths, weights, temperatures. Hundreds of imperial and metric
units are supported |

Area Calculation Tool |
Calculate the areas of common shapes such as triangles, circles and ellipses |

Which day of the week were you born on |
Calculate the day of the week for any date between 1582 and 4902 |

Roman Numerals |
Can convert from/to Roman Numerals. What year was MDMCLXXI ? |

Greatest Common Factor Tool |
Find the greatest common factor of 2 or 3 numbers. Useful for simplifying fractions. |

Least Common Multiple Tool |
Find the least common multiple of 2 or 3 numbers. Useful for adding or subtracting fractions. |

Full Precision Calculator |
Calculate answers to full precision. Want to multiply to hundreds of digits of accuracy? No problem! |

Quadratic Equation Solver |
Have an equation like *"***ax**^{2} + bx + c = 0"? We can solve it! |

Function Grapher and Calculator |
You can plot two functions together, and even save the results as a web link. |

Standard Deviation Calculator |
Shows you the results at every stage of the calculation |

Complex Number Calculator |
Enter the formula, see the result. |

Counting Money |
Its a game, but also useful for adding up money. |

Power Set Maker |
Makes Power Sets from Sets |

Decimal to Fraction Converter |
Converts Decimals to Fractional form, showing steps. |

Combinations and
Permutations Calculator |
Calculate Combinations and Permutations |

All Factors Tool |
Find all the factors of a number. |