Resize a photo's crop to a target aspect ratio and see how much is kept.
The source is fit to the target ratio by trimming whichever axis exceeds the required proportion, then the kept area is computed as a percentage. Each frame ratio suits a purpose, and knowing how much image you lose to a crop stops you from framing crucial detail too tight.
Crop Ratio
Fit source pixels to target aspect; area kept = cropped area / original
Fit source pixels to target aspect; area kept = cropped area / original The source is fit to the target ratio by trimming whichever axis exceeds the required proportion, then the kept area is computed as a percentage.
Each frame ratio suits a purpose, and knowing how much image you lose to a crop stops you from framing crucial detail too tight.
This calculator takes 3 inputs: Source width, Source height, Target ratio. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.