Ratio Calculation

1. Select the "ratio pattern" you want. You can also enter any value you like.
2. Enter the value required for the calculation in either of the ratios.
3. The value you do not enter will be calculated automatically.

A ratio is a number that indicates the relationship between two or more numbers or quantities, and expresses how much larger or smaller one quantity is compared to another. Ratios are generally written with a colon (:) as in "A:B" to show the proportion of A and B.

Ratios are used to compare and understand the relationship between different quantities and to balance and scale things. Knowledge of ratios is useful in a wide range of situations, from everyday life to business and academic fields.

• Golden ratio (1:1.618)Used in art and architecture since ancient times as a beautiful and balanced ratio. It is also found in nature.
• Silver ratio (1:1.414)This ratio remains the same even if you fold a rectangle in half, so it is often used in Japanese architecture and design.
• Golden ratio (1:1.732)The ratio between the length of the sides of an equilateral triangle and its height. It is considered to be geometrically beautiful.
• Bronze ratio (1:3.303)It is said to have been used in ancient Greek architecture, derived from the ratio of architectural columns.
• Second golden ratio (1:2.618)An expanded version of the golden ratio, it creates a greater balance.
• HVGA (3:2)A display aspect ratio used in old mobile devices.
• SD (4:3)Aspect ratio used in standard TVs and old PC monitors.
• HD (16:9)A standard aspect ratio for modern TVs and smartphones, suitable for widescreen displays.
• WUXGA (16:10) An aspect ratio used in some wide displays, and is seen in business monitors.
• Square (1:1) A square ratio with equal width and height. Often used in social media icons.
• Univisium (2:1) A ratio where the width is twice the height, used for panoramas and certain movie scenes.
• Ultrawide (21:9) The same ratio as a cinema screen, used for ultrawide monitors that emphasize realism.
• Cinemascope (2.35:1) A ratio used in cinemascope filming, providing a wide field of view.
• 5:4 A ratio used in some computer monitors, close to 4:3.
• A-series paper (1:1.4142)The ratio of A4 or A3 paper, which keeps the same ratio even when folded.
• 3:4The ratio used for portrait (vertical) photos, and has a shape close to a square.
• 9:16The aspect ratio often used for vertical videos and smartphone displays.
• IMAX (1.43:1)The screen ratio of IMAX theaters in movie theaters, a ratio that ensures a wide field of view.
• 35mm film (3:2)The ratio of images taken with a 35mm film camera, a classic photography ratio.
• Social media vertical (4:5)The ratio often used for vertical photos such as Instagram.
• Panorama (3:1)This ratio is used for panoramic photos and videos that spread horizontally.

1. Specify ratioSelect the ratio you want to calculate. Example:The golden ratio of "1:1.618".
2. Give one valueGive one value you want to calculate based on the ratio. Example:Let's say the value of B is "161.8".
3. Calculate the other numberTo find A based on the ratio "1:1.618", divide B by the ratio value. $$A = B / 1.618
   Example:If B is "161.8", $$A = 161.8 / 1.618 = 100
4. Calculate the ratio of the resultThe ratio of A to B is therefore "100:161.8".

This tool is available for free.