Adding fractions
Convert both fractions to a common denominator. For 1/2 + 1/3, use sixths: 3/6 + 2/6 = 5/6.
Use Fraction Calculator
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Fraction rules
To add a/b and c/d, compute (ad+bc)/bd and reduce by the greatest common divisor. To multiply, use ac/bd. Never use a denominator of zero.
How to use Fraction Calculator
Fraction Calculator helps you add, subtract, multiply and divide fractions with simplified results. It is a simple, mobile-friendly tool available at fractioncalc.pages.dev. Start by entering information or choosing the action shown above, then read the result immediately.
Can I use this tool for free?
Yes. The core tool does not require payment or account registration.
What should I check before trusting the result?
Confirm your inputs and consider whether the output is an estimate. Weather, prices, medical, legal, financial and safety-related decisions require appropriate authoritative sources.
Privacy and data handling
Most calculations take place in the browser. Some tools may request public third-party information, which is described next to the relevant tool. This edition does not contain tracking scripts or advertising code.
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Multiplying fractions
Multiply numerators together and denominators together, then reduce the result to simplest terms.
Division and zero
To divide by a fraction, multiply by its reciprocal. A denominator cannot be zero, and division by a fraction equal to zero is undefined.