# Ratio calculator

## Finds the missing value in a set of ratios

## What is Ratio?

A ratio is a quantitative relationship or comparison between two or more quantities. It expresses how many times one value contains or is contained within another value. Ratios are often used to describe proportions, relationships, or comparisons between different elements or parts of a whole.

In a ratio, you typically have two numbers separated by a colon (e.g., 2:1) or expressed as a fraction (e.g., 1/2). These numbers can represent various things, such as lengths, quantities, amounts, or any other measurable values.

For example, if you have a bag containing 20 red marbles and 10 blue marbles, the ratio of red marbles to blue marbles is 20:10 or 2:1, which means there are two times as many red marbles as there are blue marbles.

Ratios are used in various fields, including mathematics, science, finance, and everyday life, to describe relationships, make comparisons, and solve problems involving proportions and relative quantities.

### What is Aspect Ratio?

Aspect ratio is a mathematical ratio that describes the relationship between the width and height of an image or screen. It represents the proportion between the width and height in the form of a fraction or decimal number. Aspect ratio is an important concept in images, videos, and graphic design because it influences how we display and view content on a screen.

For example, in a screen with a 16:9 aspect ratio, it means that the width of the screen is 16 units, and the height is 9 units. This can be expressed using a fraction (16/9) or a decimal number (1.77) to describe this ratio.

Different aspect ratios are suitable for different applications and purposes. For instance, the 4:3 aspect ratio is commonly used in classic televisions and computer monitors, while the 16:9 aspect ratio is often used in HD and Full HD screens. Aspect ratio also determines how we experience various forms of media, such as watching movies in theaters or on TV.

#### Popular aspect ratios and sizes of videos and Screens

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 |

See also