Fractions Calculators

icon of fractions being calculated on board

Use the first calculator to add, subtract, multiply or divide fractions. Use the second calculator to calculate mixed fractions. Finally, use the third calculator to simplify a fraction, using the greatest common factor. Should you wish to convert a decimal number to a fraction, please use the decimal to fraction calculator. For help with calculating fractions manually, please see the information at the bottom of this page.

Standard fractions calculator

Use this calculator to add, subtract, multiply and divide basic fractions.

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Mixed fractions calculator

Calculate using mixed fractions. For simple fractions, enter the fraction with a slash (/). Example: 3/4. For mixed numbers, use spaces. Example: 16 3/4.

Simplify a fraction

Find the common factor of a fraction and then simplify it to its lowest form. A decimal conversion is also provided.

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Whilst every effort has been made in building this fractions calculator, we are not to be held liable for any special, incidental, indirect or consequential damages or monetary losses of any kind arising out of or in connection with the use of the converter tools and information derived from the web site. This fractions calculator is here purely as a service to you, please use it at your own risk. Do not use calculations for anything where loss of life, money, property, etc could result from inaccurate conversions.

Please see the full disclaimer for more information.

faq icon

Fractions calculator - FAQ

I've been asked to provide some information about how the fractions calculator works out its results. So, I've included the formulae below along with some examples. Note that you need to have JavaScript enabled in your browser for these fraction formulae and examples to appear correctly formatted.

Fractions on dice

Adding fractions

In order to add fractions together, use the following formula:

\( \dfrac{a}{b} + \dfrac{c}{d} = \dfrac{ad + bc}{bd} \)

Example of how to add fractions:

\( \dfrac{2}{3} + \dfrac{1}{4} = \dfrac{(2\times4) + (3\times1)}{3\times4} = \dfrac{11}{12} \)

Subtracting fractions

To subtract fractions, the following formula can be used:

\( \dfrac{a}{b} - \dfrac{c}{d} = \dfrac{ad - bc}{bd} \)

Example of how to subtract fractions:

\( \dfrac{2}{3} - \dfrac{1}{4} = \dfrac{(2\times4) - (3\times1)}{3\times4} = \dfrac{5}{12} \)

Multiplying fractions

When multiplying fractions, this formula will help:

\( \dfrac{a}{b} \times \dfrac{c}{d} = \dfrac{ac}{bd} \)

Example of how to multiply fractions:

\( \dfrac{2}{3} \times \dfrac{1}{4} = \dfrac{(2\times1)}{(3\times4)} = \dfrac{2}{12} = \dfrac{1}{6} \)

Dividing fractions

If you are looking to divide two fractions, give this formula a try:

\( \dfrac{a}{b} \div \dfrac{c}{d} = \dfrac{ad}{bc} \)

Example of how to divide fractions:

\( \dfrac{2}{3} \div \dfrac{1}{4} = \dfrac{(2\times4)}{(3\times1)} = \dfrac{8}{3} \)

To learn how to calculate fractions using these formulae, take a look at our article how to add, subtract, multiply and divide fractions.

If you would like help with converting between decimals and fractions, see our article how to convert a decimal to a fraction.

If you have any problems using my fractions calculator tool, or any suggestions, please contact me.