Image File Size Calculator
Image File Size
Estimate image file size from resolution and format
Batch Image Storage
Calculate storage needed for a batch of images
Formula
Uncompressed = Width x Height x (BitDepth / 8) | Compressed = Uncompressed x Compression Ratio
Frequently Asked Questions
Why do JPEG files vary so much in size?
JPEG compression is lossy and adaptive. Images with lots of detail (textures, noise) compress less than smooth images (sky, gradients). Quality settings drastically affect size: quality 95 can be 3-5x larger than quality 75 with minimal visible difference. The same resolution can produce very different file sizes.
Which image format should I use?
JPEG for photos (lossy, smallest size). PNG for graphics with transparency or text (lossless). WebP for web (30% smaller than JPEG/PNG). AVIF for next-gen web (50% smaller than JPEG). TIFF/BMP for uncompressed archival. SVG for vector graphics (logos, icons).
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