Image File Size Calculator Online
Estimate uncompressed memory buffers and compressed JPEG, PNG, and WEBP file sizes.
Auto-detect Image Dimensions
Current Input: 1920 × 1080 pixels (2.07 MP)
Dimensions Input
Estimated File Sizes
About Image File Size Calculator Online
Calculate uncompressed raw pixel memory buffers and estimate output file sizes across JPEG, PNG, and WEBP compression formats.
Built on modern web technologies including WebAssembly, Web Workers, and HTML5 Canvas, it handles complex image computations with desktop-grade speed.
Execute all operations locally on your machine with zero server latency, complete privacy defense, and unlimited free batch usage.
How to use Image File Size Calculator Online:
Enter image pixel width and height or upload a sample picture.
View estimated raw memory buffer size vs compressed JPEG, PNG, and WEBP sizes.
When People Use It
Print Sizing & 300 DPI Resolution Planning
Calculate exact pixel dimensions needed for A4, A3, posters, and canvas prints at 300 DPI print quality.
Billboard & Large Format Banner Scaling
Determine optimal resolution and viewing-distance DPI for trade show booths, vehicle wraps, and billboards.
Display Aspect Ratio Proportions
Verify 16:9, 16:10, 4:3, and 21:9 ultrawide proportions to prevent letterboxing on presentation screens.
Digital File Size Estimation
Estimate uncompressed vs compressed bitrates and storage footprint across different bit depths.
Privacy
Your photos are processed inside your browser. Files are not sent to our servers. For details on what data the site itself collects, see the Privacy Policy.