If your computer isn't performing to the best of its ability, there's a tool you can use to troubleshoot. These are the best bottleneck calculators for Windows.

Ahead, we offer our best calculator recommendations and advice on how to find the right model for you. The Best Calculators. Best Overall: Texas Instruments TI-84 Plus CE Graphing Calculator; ...

From finance to physics, Calculator Soup has it all. I could honestly spend all day talking about the various tools here. There's one that can convert any number with decimals to a fraction.