Calculadora de Proporção de Aspecto
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
nh = nw × (h / w)
About this calculator
This aspect ratio calculator quickly finds the missing dimension between the width and height of an image or video. Simply enter the desired width and the original ratio (e.g., 16:9 or 4:3) to get the corresponding height. You can also set a target height and discover the required width. The tool is useful for resizing media without distorting the content, maintaining the exact proportion.
The operation is straightforward: the calculator applies the formula nh = nw × (h / w), where 'w' and 'h' are the original ratio values (width and height) and 'nw' is the new desired width. The result 'nh' is the calculated new height. If you enter a target height, the calculation is inverted to find the width. Everything is done instantly, avoiding manual errors.
Use this calculator when resizing photos for social media, adjusting videos for platforms like YouTube or TikTok, or preparing images for websites and print. It is essential for designers, video editors, photographers, and anyone who needs to ensure visual content maintains the correct proportion without unwanted cropping or distortion.
Important precautions: always check that the ratio entered is correct (e.g., 16:9 means width 16 and height 9). The calculator assumes ratio values are integers or decimals, but does not accept text. Remember that the result is automatic and should be verified before applying the final resize, especially in professional projects where precision is critical.
Frequently asked questions
Can I use this calculator for any aspect ratio?
Yes, as long as you enter the width and height values of the original ratio, such as 16:9, 4:3, 1:1, etc. The calculator accepts integers or decimals.
What if I want to resize an image to a specific height?
Simply enter the desired height in the appropriate field and the original ratio. The calculator will provide the required width to maintain the proportion.
Does the calculator consider portrait or landscape orientation?
Yes. If the width is greater than the height, the orientation is landscape; otherwise, it is portrait. Just enter the correct values from the original ratio.
Can I use this tool for videos?
Yes, it works for any rectangular media, including videos. Just make sure to use the correct aspect ratio of the original video.
Is the result rounded?
Yes, the calculator displays the result with two decimal places, but you can manually round it as needed for whole pixels.