Fractions trip up students and adults alike. Finding a common denominator, flipping the second fraction to divide, and converting mixed numbers are easy steps to forget halfway through a recipe, a woodworking cut list or a homework sheet. This free fraction calculator does the arithmetic and, more importantly, shows every step so you can follow the method and check your own work. Enter two fractions or mixed numbers (like 2 1/3), choose add, subtract, multiply or divide, and get the answer simplified to lowest terms, as a mixed number and as a decimal. For addition and subtraction, the steps show how the least common denominator is found and how each fraction is converted. For multiplication you'll see cross-cancelling and the numerators and denominators multiplied, and for division the "keep, change, flip" rule. Negative numbers and whole numbers work too. Two more handy tools sit underneath. The simplifier reduces any fraction using the greatest common divisor, and the decimal-to-fraction converter turns 0.375 into 3/8, or 0.333… into 1/3 within a tolerance you choose. That's useful for converting measurements to the nearest 1/16 inch. All calculations use exact integer arithmetic, so there are no floating-point rounding errors, and everything runs in your browser.
Calculate with fractions
Formats: 3/4, 2 1/3 (mixed), -5/6, 7
Decimal to fraction
The rules
- Add/subtract: use a common denominator, then add the numerators.
- Multiply: numerator × numerator, denominator × denominator.
- Divide: keep the first, change ÷ to ×, flip the second.
- Simplify: divide top and bottom by their greatest common divisor.
FAQ
How do I enter a mixed number?
Type the whole number, a space, then the fraction: 2 1/3.
Why show steps?
So students can learn the method and check homework, not just copy answers.
Can it handle negative fractions?
Yes. Put a minus sign in front: -3/4 or -2 1/2.
Are results exact?
Yes. It uses exact integer arithmetic, not rounded decimals.
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