Fraction Calculator
Add, subtract, multiply and divide fractions and mixed numbers with step-by-step working, simplify fractions and turn decimals into fractions.
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How to use Fraction Calculator
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Open Fraction Calculator on this page. It loads right in your browser.
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Add your file, text or values and adjust the settings.
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Copy the result or download it. Nothing is uploaded or stored.
How to use it: Fraction Calculator
This fraction calculator works with simple fractions and mixed numbers. Enter two fractions, choose +, −, × or ÷ and get the answer in lowest terms, as a mixed number, a decimal and a percentage: with every step shown so you can follow the method.
Two extra modes help with homework: Simplify reduces any fraction by its greatest common divisor, and Decimal to fraction turns values like 0.375 or 0.3333 into exact fractions (3/8, 1/3).
How to use it
- Type the first fraction; use the small left box for a whole number to make a mixed number.
- Choose +, −, × or ÷.
- Type the second fraction.
- Read the simplified result, the mixed number, decimal, percentage and the steps.
How it is calculated
a/b + c/d = (a·d + c·b) ÷ (b·d), using the least common denominator; a/b × c/d = (a·c)/(b·d); a/b ÷ c/d = a/b × d/c. Results are reduced by dividing top and bottom by their greatest common divisor.
Worked example
1/2 + 1/3: the common denominator is 6, so 3/6 + 2/6 = 5/6. 2 1/4 × 1 2/3 = 9/4 × 5/3 = 45/12 = 15/4 = 3 3/4. 3/4 ÷ 1/8 = 3/4 × 8/1 = 6. And 0.625 as a fraction is 5/8.
Who uses it
- Pupils learning to add and simplify fractions
- Parents checking homework
- Cooks scaling recipe quantities like 2/3 cup
- Woodworkers and DIYers working with inch fractions
Tips
- Always simplify the final answer: teachers usually expect lowest terms.
- To divide by a fraction, multiply by its reciprocal (flip it).
- Convert mixed numbers to improper fractions before multiplying or dividing.
Free, private and instant: every calculation runs in your browser, nothing is uploaded or stored, and there is no sign-up or limit. Related calculators: scientific calculator, percentage calculator, grade calculator.
Features
- + − × ÷ with fractions and mixed numbers
- Step-by-step working
- Simplify any fraction
- Decimal to fraction converter
- Result as mixed number, decimal and percent
Frequently asked questions
How do you add fractions with different denominators?
Find a common denominator, convert both fractions, add the numerators and simplify. 1/4 + 1/6 = 3/12 + 2/12 = 5/12.
How do you simplify a fraction?
Divide the numerator and denominator by their greatest common divisor. 18/24 ÷ 6 = 3/4.
How do I enter a mixed number?
Put the whole number in the small box to the left and the fraction in the boxes on the right, e.g. 2 and 1/3 for 2 1/3.
How do I convert a decimal to a fraction?
Use the Decimal to fraction mode. 0.75 becomes 3/4, 0.125 becomes 1/8 and repeating decimals like 0.6666 become 2/3.
Can it handle negative fractions?
Yes. Type a minus sign in the numerator or the whole number, e.g. −3/4.
Is this calculator free and private?
Yes. It is completely free, needs no account and runs entirely in your browser, so the numbers you type are never sent to a server or stored.