About : FAQ : Forum Calc request : Bug report MyCalcTool Now 206 calcs and counting... 
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CalcTool provides quick, simple, easy and free online calculation and unit conversion tools for the home, school, recreation, the office, for technical disciplines, and also just for fun.
It offers hundreds of automatic calculators that help you find the answer you need step by step, just by filling in the blue boxes. Each "calc" also has a helpful diagram, a brief description of the theory behind the calculation, and some notes to help you get the most of it. Many of the calcs were specially developed for CalcTool, from public experimental data or basic mathematical and scientific principles, and are not found anywhere else. Perhaps the most powerful feature of CalcTool is the unit menus, which allow you to enter input and receive output in whatever units are most convenient for you  be it metric, imperial, or any of many other conventional and unusual options. We hope that you won't need to look up equations, leaf through text books, or fiddle with spreadsheets any more. CalcTool has sections covering everything from math, physics, chemistry and biology to finance, economics, culture, and sport. Browse around, have some fun, and bookmark us for later! 
