# Math Tools and Calculators

Here are some really useful applications to speed your way to that all-important solution.

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.
Calculator Enter formulas such as (3+2/9)^2 or sin(1/5), has history and even a slider for an "a" value.
Scientific Calculator Accepts formulas such as (3+2/9)^2 or sin(1/5) and you can also click on a keypad.
Sigma Calculator See what happens when you sum up a series of functions.
Unit Converter A neat yet powerful Unit Converter. Can convert length, mass, volume, temperature and more. Hundreds of imperial and metric units are supported
Area Calculation Tool Calculate the areas of common shapes such as triangles, circles and ellipses
Polyhedron Models Spin, explode and see the nets of over 100 polyhedra.
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? Done!
Quadratic Equation Solver Have an equation like "ax2 + 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.
Equation Grapher Graph equations like "x2+y2=2"
3D Function Grapher Plot an f(x,y) style function like x^2-y^2
Complex Number Calculator Enter the formula, see the result.
Counting Money Its a game, but also useful for adding up money.
Mix Slider Find the right amounts of a mixture.
Power Set Maker Makes Power Sets from Sets
Decimal to Fraction Calculator 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.
Sigma Calculator Add up a sequence.
Vector Calculator Convert between magnitude/angle and x,y. Add vectors. Dot product.
Matrix Calculator Do matrix calculations such as Determinant, Inverse and Multiplication
Data:
Standard Deviation Calculator Shows you the results at every stage of the calculation
Confidence Interval Calculator Confidence Interval Calculator
Chi-Square Calculator Chi-Square Test Calculator
Correlation Calculator Correlation Calculator
Least Squares Calculator Least Squares Regression Calculator
Integral Approximation Calculator Integral Approximation Calculator
Fourier Series Grapher Fourier Series Grapher
Money:
Investment/Loan Graph Investment or Loan Graph

## Other Cool Stuff

App Description
Spiral Artist Spiral Artist
Symmetry Artist Symmetry Artist
Tessellation Artist Tessellation Artist
General Drawing Tool General Drawing Tool

Gravity Freeplay A simulation of how suns, planets, moons, etc behave under the influence of gravity
Moire Patterns Explore the interesting "interference patterns" created by overlapping grids, lines, etc
Estimation Games Try your estimation skills