---
title: "Ratio to Percent Calculator: Turn A:B Into Percentages | MCC"
description: "Turn a ratio such as 3:5 into percentages of the whole, with the simplest form and the amount of A for every 1 of B. Free and private."
url: "https://mcc-solutionsnj.com/tools/ratio-to-percent-calculator"
---

Free tool

# Ratio to percent calculator

## Overview

Enter the parts of a ratio and see what percent of the whole each part is.

Part A

Part B

Part C (optional)

Printable pack · $9

### Ratio and Proportion Worksheet Pack

About fifty original problems on printable pages, from writing a ratio to word problems, with every answer worked out in a separate key.

[See what is inside ($9)](/toolkits/ratio-proportion-worksheet-pack) [Free sample](/toolkits/ratio-proportion-worksheet-pack#free-starter)14-day full refund

Share

## Put this tool on your own site

Free to use. Paste this where you want it to appear. It runs in the visitor's browser, so nothing they enter is sent to us.

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How it works

## How it works

Add the parts to get the whole, then divide each part by the whole and multiply by 100. For 3:5 the whole is 8, so A is 3 / 8 = 37.5% and B is 5 / 8 = 62.5%. Leave the third part at 0 for a two-part ratio.

Example: a mix of 3 parts concentrate to 5 parts water is 3:5. The whole is 8 parts, so the concentrate is 37.5% and the water is 62.5%. For a 1:2:3 split of $600, the shares are 16.67%, 33.33% and 50%, which are $100, $200 and $300.

FAQ

## About this calculator

**Is a ratio of 3:5 the same as 3/5?**

Not quite. 3:5 compares two parts, so the whole is 8 and A is 3/8 of it. The fraction 3/5 compares A with B alone, which is 60%.

**How do I split an amount by a ratio?**

Convert each part to a percentage of the whole, then multiply by the amount. Splitting $800 in a 3:5 ratio gives $300 and $500.

**Can the parts be decimals?**

Yes. The percentages still add to 100%. The simplest-ratio line only appears for whole numbers.

**Is anything saved?**

No. The math runs in your browser and nothing you enter is sent to us.

Related: [ratio calculator](/tools/ratio-calculator), [percentage calculator](/bookkeeping/percentage-calculator), [fraction to decimal calculator](/tools/fraction-to-decimal-calculator). See [all free tools](/free-tools). More free tools: [Decimal hours to minutes converter](/tools/decimal-hours-to-minutes-converter), [Temperature converter](/tools/temperature-converter), [Weight converter](/tools/weight-converter), or [see all free tools](/free-tools).

General information, not tax or legal advice. [How we write and check our tools](/editorial-standards).

Document pack

### Ratio and Proportion Worksheet Pack

About fifty original problems on printable pages, from writing a ratio to word problems, with every answer worked out in a separate key.

[See what is inside ($9)](/toolkits/ratio-proportion-worksheet-pack)

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