104 RPN Calc

104 RPN Calc is a calculator which uses the Reverse Polish Notation to perform the calculations. That is, if you want to get the surface of a circle with radius 104 you will do:

3.14 ☑ 104 ☑ x² ×

Or even easier:

104 x² π ×

This piece of software is licensed under the GPLv3. That means you can download and install it for free and enjoy its features:

☞ Basic operations ( + × √ … )
☞ Trigonometric functions ( sin cos tan rad→deg … )
☞ Extra functions ( log x̅ Σ Π surface-of-a-triangle … )
☞ History saver to go back and forward ( ↶ ↷ )