Free online math calculators for all levels — from basic arithmetic to advanced algebra, statistics, and number theory.
All calculators on MegaCalcOnline.com are free to use and work directly in your browser with no downloads or sign-up required. They are designed to provide step-by-step solutions to help you understand the mathematics, not just the answer.
These calculators are aligned with the Australian Curriculum: Mathematics (AC:M) from the Australian Curriculum, Assessment and Reporting Authority (ACARA). They cover content from Years 7–12 and beyond, including number, algebra, measurement, statistics, and probability.
| Priority | Operation | Example |
|---|---|---|
| 1st (highest) | Brackets/Parentheses | (2+3) × 4 = 20 |
| 2nd | Orders (powers, roots) | 2 + 3² = 2 + 9 = 11 |
| 3rd | Division and Multiplication (left→right) | 6 ÷ 2 × 3 = 3 × 3 = 9 |
| 4th (lowest) | Addition and Subtraction (left→right) | 5 − 2 + 3 = 6 |
Why does 0.1 + 0.2 not equal exactly 0.3 in calculators?
Computers store numbers in binary floating-point, and 0.1 and 0.2 cannot be represented exactly in binary (similar to how 1/3 = 0.333... in decimal). The sum produces 0.30000000000000004 in most languages. This is a fundamental limitation of IEEE 754 floating-point arithmetic, not a calculator error. Financial calculations should use decimal arithmetic libraries to avoid this.
What is integer division?
Integer division (also called floor division) divides and discards the remainder, returning only the whole number part. 7 ÷ 3 = 2 (remainder 1 discarded). In most programming languages: 7 // 3 = 2. The remainder is found with the modulo operator: 7 mod 3 = 1 (7 = 2×3 + 1).