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Adjusting picture/pixel sizes proportionally

This online calculator adjusts the second dimension of a picture/video, given the new first dimension, keeping the original proportions

This page exists due to the efforts of the following people:

Timur

Timur

KL

Karen Luckhurst

Created: 2020-11-11 09:02:25, Last updated: 2020-11-20 11:59:57
Creative Commons Attribution/Share-Alike License 3.0 (Unported)

This content is licensed under Creative Commons Attribution/Share-Alike License 3.0 (Unported). That means you may freely redistribute or modify this content under the same license conditions and must attribute the original author by placing a hyperlink from your site to this work https://planetcalc.com/8989/. Also, please do not modify any references to the original work (if any) contained in this content.

Sometimes you need to resize a picture or video, keeping the original proportions. In most resizing tools you need to enter only one new dimension and they do the math to calculate the other one proportionally. But some tools require you to enter both dimensions by yourself. The calculator below does the math to get the second dimension value from the first, saving the proportion. Formulas are simple and derived from the next proportion:

\frac{w_0}{h_0}=\frac{w_1}{h_1},
where
w0 - current width in pixels,
h0 - current height in pixels,
w1 - new width in pixels,
h1 - new height in pixels.

Then,
formula for the new width if you enter your new desired height is:
w_1=\frac{w_0 h_1}{h_0},
formula for the new height if you enter your new desired width is:
h_1=\frac{h_0 w_1}{w_0}

PLANETCALC, Adjusting picture/pixel sizes proportionally

Adjusting picture/pixel sizes proportionally

New height
 
New width
 
Digits after the decimal point: 1

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PLANETCALC, Adjusting picture/pixel sizes proportionally
Timur2020-11-20 11:59:57

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