1. fxSolver is an free online math solver, equation library, graphing calculator and science/engineering problem helper. To get started, add some formulas, fill in any input variables and press "Solve."

  2. SpeedCrunch. SpeedCrunch is a high-precision scientific calculator featuring a fast, keyboard-driven user interface. It is free and open-source software, licensed under the GPL. Download Documentation Donate .

  3. The built in Calculator on the iPhone.

  4. Mathematica is a technical computing system with a broad range of uses throughout various fields of discipline.

  5. Get help and support for Windows —Windows 10, Windows 8.1, Windows 7, and Windows 10 Mobile.

  6. RealCalc Scientific Calculator

  7. Photomath is a mobile app that will give you the ability to test your equations through a simple calculator interface that will fully explain the solution in a step-by-step fashion. Read more about Photomath.

  8. Soulver is a software application that functions as a calculator that allows you type a continuous stream of information rather than having to input data into multiple cells.

  9. PCalc is the powerful choice for scientists, engineers, students, programmers, or indeed anybody...

  10. Free Step-By-Step Solutions to algebra problems.

  11. Mathway is a freemium math solving app that helps you find the solutions to any math problem you can imagine.

  12. Any individual who has ever gazed restlessly at a knotty condition needing an answer has longed for some sort of hatchet to slice through the issue.