Ratio of 13 to 18 (13:18)

Ratio of 13 to 18

A ratio of 13 to 18 can be written as 13 to 18, 13:18, or 13/18. Furthermore, 13 and 18 can be the quantity or measurement of anything, such as students, fruit, weights, heights, speed and so on.

A ratio of 13 to 18 simply means that for every 13 of something, there are 18 of something else, with a total of 31.

In the box below, you can enter a number in either box and we will calculate the other number to keep the ratio of 13 to 18. In other words, we will calculate the corresponding equivalent ratio of 13:18 for you.

To calculate the left side of the ratio, our calculator multiplies the right side by 13 and then divides the product by 18. To calculate the right side of the ratio, our calculator multiplies the left side by 18 and then divides the product by 13. Answers are rounded to two decimals if necessary.

Below is a list of equivalent ratios of 13:18 that we created using our 13:18 ratio calculator above.

13:18

26:36

39:54

52:72

65:90

78:108

91:126

104:144

117:162

130:180

143:198

156:216

We have also created a pie chart for you to put 13:18 ratio in perspective. To do so, we divided a pie into 31 pieces and then colored 13 pieces green and 18 pieces blue. The pie will look exactly the same using any equivalent ratio of 13:18.

13 to 18 pie ratio

The green part of the pie covers 41.94% and the blue part covers 58.06%. To calculate the percentages, we divided each side of the ratio by its total and then multiplied by 100, like this:

(13 / 31)×100 ≈ 41.94
(18 / 31)×100 ≈ 58.06

In fractional terms, 13/18 of the pie above is colored in green. This means that the ratio of 13 to 18 or 13:18 can also be expressed as a fraction, where the 13 to the left of the colon is the numerator and the 18 to the right of the colon is the denominator:

13:18 = 13/18

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 13 to 18, the width is 13 and the height is 18. Below is a picture of what a rectangle with a ratio of 13:18 looks like.

13 to 18 pie rectangle

Since the simplest form of the fraction 13/18 is 13/18, the simplest form of the ratio 13:18 is also 13:18.

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Ratio of 13 to 19
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