Aspect Ratio Calculator
Calculate a missing width or height from an aspect ratio, or get the ratio from two dimensions. Great for video, images and design. Free and in-browser.
Resize keeping ratio
Common ratios
Original (defines ratio)
×
Target (type width or height)
×
Width
1280
Height
720
Ratio from dimensions
Dimensions
×
Aspect ratio
16:9
Decimal
1.78 : 1
Frequently asked questions
What can it solve?+
Lock a ratio and find the missing dimension, or derive the ratio from width and height.