Fraction Calculator
Add, subtract, multiply, divide and simplify fractions, including mixed numbers, free and instant with this browser-based fraction calculator.
Enter two fractions
Results are auto-simplified. Runs in your browser; nothing is uploaded.
How to use this calculator
- Enter two fractions and pick +, −, × or ÷.
- Read the simplified result and its decimal.
How it works
Adds/subtracts over a common denominator (or multiplies/divides), then simplifies by the greatest common divisor.
Worked example
1/2 + 1/3. = 5/6 (≈ 0.8333).
Common mistakes
- Adding numerators and denominators directly — you need a common denominator first.
- Forgetting to simplify the final fraction.
Tips
- Runs entirely in your browser. Your inputs are not saved or transmitted.
Frequently asked questions
How do I add fractions?
Convert them to a common denominator, add the numerators, then simplify.
How do I multiply fractions?
Multiply the numerators together and the denominators together, then simplify.
Does it simplify?
Yes — results are always reduced to lowest terms.
Privacy?
Runs entirely in your browser. Your inputs are not saved or transmitted.
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Cite this tool
Zerdly. (2026). Fraction Calculator. Retrieved from https://www.zerdly.com/tools/fraction-calculator/
Tip: Enter any known values to calculate the remaining results.
Designed to run locally in your browser. Tool inputs are not intentionally stored by Zerdly unless stated otherwise.