Order of Operations Calculator

Evaluate a three-number expression with correct precedence, and compare it to a naive left-to-right reading. Enter the numbers and operations.

First (a)

Operation 1

Second (b)

Operation 2

Third (c)

Result

—

With precedence applied.

Usage Tip

PEMDAS: Parentheses, Exponents, Multiplication/Division, Addition/Subtraction — the last two pairs each share a level and go left to right.

THE MATH

Multiplication and division come before addition and subtraction
Within the same level, work left to right

Order of operations (PEMDAS / BODMAS) fixes the value of an expression so everyone reads it the same way.
Without it, 2 + 3 x 4 would be ambiguous.

This evaluates a (op) b (op) c with three numbers and two operations.
The left-to-right column shows what you would get ignoring precedence.
Parentheses are not included here; they would override the order.

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