Ratio Calculator
Easily calculate ratios between two or more values. Simplify complex comparisons and find proportional relationships accurately and quickly. Please provide any three values below to calculate the fourth in the ratio A:B = C:D.
Ratio Scaling Calculator
Calculate ratios and scale values proportionally. Simplify comparisons, conversions, and adjustments with precise ratio scaling calculations.
What is Ratio?
A ratio is a quantitative relationship between two numbers that describe how many times one value can contain another. Applications of ratios are fairly ubiquitous, and the concept of ratios is quite intuitive. This could likely be demonstrated by giving a child half as many cookies as his sister. While the child may not be able to voice the injustice using ratios, the raucous protestations that would most likely ensue should make it immediately obvious that he is well aware he has received 1:2 as many cookies as his sister, conceptually, if not mathematically.
As shown above, ratios are often expressed as two numbers separated by a colon. They can also be written as "1 to 2" or as a fraction ½. The ratio represents the number that needs to be multiplied by the denominator in order to yield the numerator. In this case, ½. This is clearer if the first number is larger than the second, i.e. with the ratio 2:1, 2 can contain 1, 2 times. It is also possible to have ratios that have more than two terms.
Ratios are common in many daily applications including: aspect ratios for screens, describing maps and models as a scaleddown version of their actual size, in baking and cooking, when discussing the odds of something occurring, or to describe rates, such as in finance. If, for example, a person wanted to make 5 cakes, each of which required a 1:2:3 ratio of butter:sugar:flour, and wanted to determine the total amount of butter, sugar, and flour that is necessary, it would be simple to compute given the ratio. Increasing the ratio by five times yields a 5:10:15 ratio, and this can be multiplied by whatever the actual amount of sugar, flour, and butter are used in the actual cake recipe.
Typical Aspect Ratios and Sizes of Screens and Videos
The aspect ratio is the ratio of a geometric shape's sizes in different dimensions. In the case of a rectangle, the aspect ratio is that of its width to its height. Although aspect ratios are widely used in applications such as tire sizing, paper sizing, and standard photographic print sizes, some of the most frequent uses of aspect ratios involve computer screen dimensions, mobile phone screens, and video sizes. As such, below is a list of typical computer screen/video resolutions and aspect ratios.
Name  Aspect ratio  Width (pixel)  Height (pixel) 
480p  3:2  720  480 
576p  5:4  720  576 
720p  16:9  1280  720 
1080p  16:9  1920  1080 
2160p (4K UHD)  16:9  3840  2160 
4320p (8K UHD)  16:9  7680  4320 
8640p  16:9  15360  8640 
SVGA  4:3  800  600 
WSVGA  ~17:10  1024  600 
XGA  4:3  1024  768 
XGA+  4:3  1152  864 
WXGA  16:9  1280  720 
WXGA  5:3  1280  768 
WXGA  16:10  1280  800 
SXGA (UVGA)  4:3  1280  960 
SXGA  5:4  1280  1024 
HD  ~16:9  1360  768 
HD  ~16:9  1366  768 
SXGA+  4:3  1400  1050 
WXGA+  16:10  1440  900 
HD+  16:9  1600  900 
UXGA  4:3  1600  1200 
WSXGA+  16:10  1680  1050 
FHD  16:9  1920  1080 
WUXGA  16:10  1920  1200 
QWXGA  16:9  2048  1152 
WQHD  16:9  2560  1440 
WQXGA  16:10  2560  1600 
Ratio Calculator Example
Suppose we have a dataset of sales data for three different products in a store. The table below shows the number of units sold for each product over the course of three months.
Month  Product A  Product B  Product C 

January  120  90  60 
February  180  110  75 
March  150  95  80 
Now, let's calculate the ratio between the sales of Product A and Product B for each month using a Ratio Calculator.
Using the Ratio Calculator, follow these steps:

Identify the values you want to compare:
 Numerator: Sales of Product A
 Denominator: Sales of Product B

Enter the values into the Ratio Calculator for each month:
 January: Ratio = 120 / 90 = 1.33 (rounded to two decimal places)
 February: Ratio = 180 / 110 ≈ 1.64
 March: Ratio = 150 / 95 ≈ 1.58
The Ratio Calculator will provide you with the ratios for each month:
 January: Ratio ≈ 1.33
 February: Ratio ≈ 1.64
 March: Ratio ≈ 1.58
These ratios represent the ratio of sales between Product A and Product B for each respective month. They provide insight into the relative performance or popularity of the products during that period.
Using a Ratio Calculator simplifies the process of calculating ratios, making it easier to compare different values and identify patterns or trends.