Ratio to Fraction Calculator

Inputs explained

• Ratio first part (A in A:B) — The first number in the ratio.
• Ratio second part (B in A:B) — The second number in the ratio. Cannot be zero.

How to use it

1. Fill in the fields above — each input has a hint describing exactly what to enter
2. Press Calculate to get your result instantly, right on this page
3. Copy the result, save the tool to favorites, or share and embed it anywhere

Understanding the result

Example: The ratio 3:4 gives the part-to-part fraction 3/4 and the part-to-whole fraction 3/7.

Frequently asked questions

What's the practical difference between the part-to-part and part-to-whole fractions? Part-to-part (A/B) compares the two ratio quantities directly to each other, while part-to-whole (A/(A+B)) expresses one quantity as a share of the combined total — for a 3:4 ratio that's 3/4 versus 3/7.

Does the order of A and B in the ratio matter for the results? Yes — swapping A and B changes both fractions, since the part-to-part fraction inverts and the part-to-whole fraction assigns the 'part' to a different quantity, so 3:4 and 4:3 produce different answers.

Is the Ratio to Fraction Calculator free to use? Yes — it is completely free, with no sign-up, no download and no usage limits. You can use it as often as you need.

Is my data private? Yes. The calculation runs entirely in your browser — the values you enter are never sent to our servers, stored or shared with anyone.

What information do I need? Just the following: Ratio first part (A in A:B), Ratio second part (B in A:B). Each field includes a hint explaining exactly what to enter.

Can I use it on my phone? Yes — the tool is fully responsive and works on any device, and the same calculator is available in the EasyWorkCalcs mobile app.

Privacy

Everything you enter into the Ratio to Fraction Calculator is processed entirely in your browser. Nothing is uploaded, stored or shared — your data stays on your device.