Fraction Calculator: How It Works and How to Use It
Add, subtract, multiply, or divide fractions and mixed numbers, with results automatically simplified to their lowest terms.
Like every tool on UltimateTools, it runs instantly in your browser, updates as you type, and doesn't require an account or sign-up to use.
What it calculates
Add, subtract, multiply, and divide fractions with ease.
Whether you think of it as a "fraction calculator" tool, a "simplify fractions or add fractions" tool, or simply the Fraction Calculator, this page covers the same calculation.
You can find it at any time on the Fraction Calculator page, where the calculator sits above a full explanation of the method it uses.
Tips for an accurate result
Write down what you expect the answer to roughly be before you calculate — it makes it much easier to catch a typo in your inputs.
If two different formulas should give the same answer, use both once to confirm before trusting either going forward.
Small rounding differences between two methods are normal — they don't usually mean either one is wrong.
Negative numbers and signs are a common source of quiet errors — double-check the sign of a result before using it.
Related tools worth trying
If you found the Fraction Calculator useful, Random Number Generator, Percentage Calculator, Tip Calculator cover closely related ground and are worth a look next.