1. WolframAlpha brings expert-level knowledge and capabilities to the broadest possible range of people—spanning all professions and education levels.

  2. 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."

  3. 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.

  4. 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 .

  5. The built in Calculator on the iPhone.

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

  7. 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.

  8. Calculator for the GNOME Desktop Environment, formerly known as gcalc (and gcalctool CLI).

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

  10. Numi Organic Tea is a premium, Fair Trade sustainable company specializing in unique and innovative blends of green, black, white, oolong teas, Pu-erh, rooibos, herbal and Flowering Tea™.

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

  12. Step by step calculator