A free fraction calculator that shows every step and gives the answer in lowest terms, as a mixed number, decimal and percent.
Add, take away, multiply or divide fractions and mixed numbers, with every step and the answer drawn.
Your numbers
Type fractions like 3/4, mixed numbers like 1 1/2 (with a space), decimals or plain numbers.
Your result
Fill in the fields above to see your result.
Embed this tool on your site
Paste the code into any page: WordPress, Webflow, Squarespace, Ghost or plain HTML. It's free with the credit under it, which links back to navid.me.
This free fraction calculator adds, takes away, multiplies and divides fractions and mixed numbers, and shows every step.
It gives the answer in lowest terms, as a mixed number, a decimal and a percent, and draws it so you can see what it means.
I built it because most fraction calculators give the answer and skip the working, and the working is what homework asks for.
Here's how each operation works, a worked example, and the mistakes that cost marks.
TL;DRKey takeaways
What is a fraction calculator?
A fraction calculator does arithmetic with fractions and gives the answer as a fraction, not just a decimal.
This one also reads mixed numbers like 1 1/2 and decimals like 0.75, which it turns into exact fractions (3/4).
How fraction math works
Each operation has its own rule.
Adding and taking away
Fractions can only be added when their bottoms match. So you find the lowest common denominator, the smallest number both bottoms go into, and rewrite each fraction over it.
Multiplying
Multiply the tops together and the bottoms together. No common denominator needed.
Dividing
Dividing by a fraction is the same as multiplying by it upside down. So 3/4 ÷ 2/3 becomes 3/4 × 3/2.
A worked example
Here's the example the calculator loads: 1/2 + 1/3.
The lowest common denominator of 2 and 3 is 6. So 1/2 = 3/6 and 1/3 = 2/6, and 3/6 + 2/6 = 5/6.
5/6 is already in lowest terms. As a decimal it's 0.8333, or 83.33%.
Mistakes to avoid
These are the slips that cost marks.
- Adding the bottoms: 1/2 + 1/3 isn't 2/5
- Flipping the first fraction when dividing instead of the second
- Forgetting to simplify: 6/12 should be 1/2
- Dropping the 1 in 1 1/2 before converting a mixed number
Who is the fraction calculator for?
It's for students, parents checking homework, and anyone scaling a recipe, and these tools help around it.
- Percentage calculator – for a fraction as a percent of something
- Scientific calculator – for anything beyond fractions
- Grade calculator – for your grade from your scores
Show the steps, and the answer takes care of itself.
Plan your money with your AI
Take your numbers further in
Fraction Calculator FAQs
Questions about the fraction calculator? Here's what to know.
A fraction calculator adds, takes away, multiplies and divides fractions and gives the answer as a fraction.
This free one also shows each step, the mixed number, the decimal and the percent.
Rewrite both fractions over their lowest common denominator, then add the tops.
1/2 + 1/3 = 3/6 + 2/6 = 5/6.
Flip the second fraction and multiply.
3/4 ÷ 2/3 = 3/4 × 3/2 = 9/8.
Multiply the tops together and the bottoms together, then simplify.
2/3 × 3/4 = 6/12 = 1/2.
Divide the top and the bottom by their greatest common factor.
6/12 divided by 6 on both is 1/2.
Type the number before the fraction, a space, then the fraction, like 1 1/2.
Divide the top by the bottom: the answer goes in front, and the remainder goes over the bottom.
9/8 is 1 1/8.
Yes, type a decimal like 0.75 and the calculator turns it into the exact fraction, 3/4.
Yes, it's free with no sign-up.
It runs in your browser, and your numbers stay on your device.
I did.
I'm Navid Moazzez, and I made the fraction calculator as one of my free tools on navid.me.
More about me.
Navid Moazzez
AI business strategist & AI OS builder
Navid Moazzez helps creators and founders master AI and build their own AI Operating System (AI OS) to automate their business and life.
Navid.me is reader-supported. When you buy through links on this site, I may earn an affiliate commission. Learn more.
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