Convert mathematical infix expressions into postfix notation online. Enter an expression, get the postfix result, view stack steps, generate prefix notation, and copy or download the output.
Useful for data structures, compiler design, expression parsing, stack practice, exams, and programming assignments.
Type an infix expression like A+B*C and convert it into postfix notation like ABC*+.
| # | Token | Action | Stack | Output |
|---|---|---|---|---|
| Enter an expression to see stack steps. | ||||
Infix notation is easy for humans, but postfix notation is easier for computers to evaluate using a stack.
Convert infix expressions into postfix notation instantly with proper operator precedence.
View token-by-token stack actions to understand how the conversion algorithm works.
Helpful for data structures, compiler design, algorithms, programming, and exam preparation.
Infix notation places operators between operands, such as A + B. Postfix notation places operators after operands, such as A B +. Postfix is also called Reverse Polish Notation.
This converter uses a stack-based method to handle operator precedence and parentheses. Operators with higher precedence are placed earlier in the postfix output while parentheses control the order of evaluation.
Convert infix to postfix in three simple steps.
Type an infix expression using operands, operators, and parentheses.
The tool reads tokens from left to right and uses a stack for operators.
The final postfix expression appears with stack steps, prefix output, and copy/download options.
Common questions about infix, postfix, and expression conversion.