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Infix --> Postfix
This tool gives you a way to change between infix (seen normally in most writing) and post fix also known as reverse polish notation or Polish postfix notation which is used in some HP calculators such as the 9100A and HP-35. Postfix notation is said to be harder to learn, but have several advantages when used on a calculator. It is both faster and less error prone than infix notation. You can read a lot more about the use and history of Reverse Polish Notation here. The converter supports +.-.*. / and ^..
About Expressions
Infix Expression
Operators are written in-between their operands. This is the usual way we write expressions. An expression such as A * ( B + C ) / D is usually taken to mean something like: "First add B and C together, then multiply the result by A, then divide by D to give the final answer."
Postfix Expression
Operators are written after their operands. The infix expression given above is equivalent to A B C + * D / The order of evaluation of operators is always left-to-right, and brackets cannot be used to change this order. Because the "+" is to the left of the "*" in the example above, the addition must be performed before the multiplication.