CalcBuddy.com

CalcBuddy.com is a free math portal online. The calculator section features an easy-to-use but still powerful scientific calculator. The calculator has 15 functions and 30 scientific constants. It can also display the answers as fractions instead of decimals.

The calculator section of CalcBuddy.com also contains several purpose-specific calculators, such as a BMI-calculator and a percentage calculator. it also has unit converters where you can convert anything from length and weight units to currencies and roman numerals.

CalcBuddy.com also has a math games section where you can play the game Expressionist, where you form mathematical expressions to arrive at a certain answer. The website also has a Fractals section, which allows to explore the Mandelbrot fractal inside your browser window.