Ratio of 12 to 15

Ratio of 12 to 15

A ratio of 12 to 15 can be written as 12 to 15, 12:15, or 12/15. Furthermore, 12 and 15 can be the quantity or measurement of anything, such as students, fruit, weights, heights, speed and so on.

A ratio of 12 to 15 simply means that for every 12 of something, there are 15 of something else, with a total of 27.

In the box below, you can enter a number in either box and we will calculate the other number to keep the ratio of 12 to 15. In other words, we will calculate the corresponding equivalent ratio of 12:15 for you.


To calculate the left side of the ratio, our calculator multiplies the right side by 12 and then divides the product by 15. To calculate the right side of the ratio, our calculator multiplies the left side by 15 and then divides the product by 12. Answers are rounded to two decimals if necessary.

Below is a list of equivalent ratios of 12:15 that we created using our 12:15 ratio calculator above.













We have also created a pie chart for you to put 12:15 ratio in perspective. To do so, we divided a pie into 27 pieces and then colored 12 pieces green and 15 pieces blue. The pie will look exactly the same using any equivalent ratio of 12:15.

12 to 15 pie ratio

The green part of the pie covers 44.44% and the blue part covers 55.56%. To calculate the percentages, we divided each side of the ratio by its total and then multiplied by 100, like this:

(12 / 27)×100 ≈ 44.44
(15 / 27)×100 ≈ 55.56

In fractional terms, 12/15 of the pie above is colored in green. This means that the ratio of 12 to 15 or 12:15 can also be expressed as a fraction, where the 12 to the left of the colon is the numerator and the 15 to the right of the colon is the denominator:

12:15 = 12/15

Ratio is often used when defining rectangles in width:height format. Width and height can be feet, inches, centimeters, or any other kind of length. With a ratio of 12 to 15, the width is 12 and the height is 15. Below is a picture of what a rectangle with a ratio of 12:15 looks like.

12 to 15 pie rectangle

Since the simplest form of the fraction 12/15 is 4/5, the simplest form of the ratio 12:15 is also 4:5.

Ratio Calculator
Need information about another ratio? Here you can submit another ratio for us to explain.


Ratio of 12 to 16
Go to the next ratio on our list that we have detailed information about.

Copyright  |   Privacy Policy  |   Disclaimer  |   Contact