Ratio Calculator


Instructions: Use this Ratio Calculator to either check the equality of two ratios by providing four values, or finding the missing value that makes the ratios to be equal for three numbers you provide, showing all the steps. Please type the required information in the boxes below.

\[ \displaystyle \Large A : B = C : D \]

A =


B =


C =


D =

Ratio Calculator

This calculator has two main purposes: either you want to check whether two ratios provided are equal, of you want to find a value that will make your ratios to be equal. To this end, the proposed ratio equality is A : B = C : D, and you will have to provide three or four of those values to proceed.

Once all the information required is provided (either 3 of the data or all of them) you can proceed with the calculation using the "Calculate" button.

How to Use this Ratio Calculator

This ratio calculator can greatly simplify the process of finding ratios, especially when dealing with less simple numbers. These are the steps needed to use it:

  • Input the Numbers: Enter the three or four of the numbers A, B, C and D.
  • Select the Operation: Decide whether you want to check the equality of the two rations, which case you need to provide all A, B, C and D, or whether you want to find the missing value to meet the equality of ratios, for which you need to provide 3 of the numbers.
  • Calculate: Click on the calculate button to proceed, so the tool will take care of all the details , by simplifying/comparing the ratios or solving if possible.
  • Interpret the Results: Once the result is provided, you can interpret it in the context of the problem .
Ratio Calculator

Understanding Ratios: Definitions and Examples

A ratio is a quantitative relationship between two or more numbers or variables, often expressed as a fraction or using the colon symbol (e.g., 3:5). Here are some key points to keep in my:

  • Definition: A ratio compares the size of one quantity to another, expressing how much of one thing there is compared to another.
  • Examples: Say that you have 3 apples and 5 oranges, the ratio of apples to oranges is 3:5. Or for example, if you had 10 apples and 15 oranges, the ratio remains the same, because it would be 10:15, but when simplified it is 2:3.

Types of Ratios

Part-to-Part Ratios

Part-to-part ratios compare two individual parts of a whole to each other. For instance, if you have a recipe that calls for 2 cups of flour and 1 cup of sugar, the ratio of flour to sugar is 2:1.

Part-to-Whole Ratios

On the other hand, part-to-whole ratios compare a part to the total sum of all parts. Using the same recipe example, the total parts (flour + sugar) are 3, so the ratio of flour to the total mix is 2:3.

How to Calculate Ratios

Steps for a Ratio Calculation

Normally you will use a calculator to assists you, but here's how you can calculate ratios if you do it manually:

  • Identify the Quantities Involved: Establish which two or more quantities are the ones you want to compare.
  • Divide: Divide and simplify one quantity by the other to get the ratio. For example, if you have 4 apples and 1 orange, the ratio is \( \frac{4}{1} \) or 4:1.
  • Simplify: If possible, simplify the ratio by dividing both numbers by their greatest common divisor (GCD). For instance, 4:2 simplifies to 2:1.

Applications of Ratios in Everyday Life

Aspect Ratios in Screens and Videos

One interesting life application of ratios is aspect ratios, which are crucial in determining the shape of screens and videos. Common aspect ratios include:

  • 16:9 for widescreen TVs and monitors
  • 4:3 for older TVs and some computer monitors
  • 21:9 for ultra-wide screens
  • 9:16 for short-form videos in social media

Ratios in Cooking and Baking

Cooking recipes will use ratios to ensure the right balance of ingredients. For example:

  • A 1:2 ratio of sugar to flour in a basic cookie recipe.
  • A 3:1 ratio of water to rice when cooking.

Financial Ratios

Financial analysts use ratios to assess the health of a company:

  • Debt-to-Equity Ratio: Measures a company's financial leverage.
  • Price-to-Earnings Ratio: Evaluates a company's stock value relative to its earnings.
Ratio Calculation

What is the Ratio of 3 to 5?

The ratio of 3 to 5 is simply written as 3:5. This means for every 3 parts of one quantity, there are 5 parts of another.

What is the 4 to 1 Ratio?

A 4 to 1 ratio means for every 4 parts of one quantity, there is 1 part of another. This can be written as 4:1 or \( \frac{4}{1} \).

Ratio Calculator Tools

Online Ratio Calculators

There are numerous online tools available that can help you calculate ratios:

  • Simple Ratio Calculators: Enter two numbers to get the ratio.
  • Advanced Ratio Calculators: Allow for multiple inputs and different types of ratios.

Ratio Scaling Calculator

Scaling calculators help in adjusting ratios to fit different sizes or quantities:

  • Enter the original ratio and the desired scale factor.
  • The calculator will provide the new scaled ratio.

Advanced Ratio Calculations

Equivalent Ratios

Equivalent ratios are ratios that express the same relationship between many ratios but expressed in different terms. For example, 2:3 is equivalent to 4:6 or 6:9.

Converting Ratios to Fractions

In order to convert a ratio to a fraction you need to:

  • Write the ratio as a fraction, with the first number as the numerator and the second as the denominator.
  • Simplify the fraction if possible.
Ratio Comparison

Explore More Ratio and Fraction Calculators

Ratios not only play a role in algebra, but also they do in finance, and you may need to understand things like liquidity, etc, for which our Quick Ratio Calculator can help you assess a company's ability to meet its short-term obligations with its most liquid assets. This can be particularly useful if you're involved in financial analysis or investment.

When working with ratios, understanding proportions is key. Our Proportions Calculator allows you to solve for unknown values in proportional relationships, which can be invaluable in various mathematical and real-world applications, from cooking recipes to scaling models.

Furthermore, if your work involves fractions, our suite of tools can simplify your tasks. For instance, the Fraction Calculator can perform basic operations with fractions, while the Fraction to Percentage Calculator converts fractions into percentages, making it easier to interpret data or understand proportions in a different format.

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