Image Compression Calculator
Calculate image compression percentage, saved KB, and target file size. Plan how much to compress photos for websites and uploads.
Calculate the target first, then convert, compress, resize, or clean the image with AI when needed.
Calculate Compression
Calculate dimensions, compression, file size, print size, and web image budget from one set of inputs.
2,073,600 total pixels, 2.07 MP.
Estimated WEBP output at 80% quality.
Save about 950 KB to reach 250 KB.
Estimated resized file: 113 KB.
6.40 x 3.60 in
At 300 DPI. Try 300 for high-quality prints or 150 for larger viewing-distance prints.
125 KB each
Current estimate is 3.54 MB for 8 images against a 1,000 KB budget.
Plan compression targets before editing
Compression works best when you know the target. This calculator turns original size and desired output size into a clear compression percentage and savings estimate.
Use it for upload limits, page-speed budgets, product catalogs, and social media images that need to stay sharp while loading quickly.
Image planning targets
Frequently asked questions
How do I calculate compression percentage?
Subtract target file size from original file size, divide by original file size, then multiply by 100.
Does higher compression reduce quality?
Usually yes. Stronger compression saves more space but can soften detail or introduce artifacts.
Should I resize or compress first?
Resize first when dimensions are too large, then compress the resized image to hit the final file-size target.
Plan the image, then improve it
Use free calculators for sizing and compression decisions, then use Photo Cut tools when the image needs AI cleanup, watermark removal, logo removal, or smarter compression.