Image File Size Estimator
Estimate the file size of an image before you export it. Useful for planning bandwidth budgets.
Note: These are theoretical estimates based on typical compression ratios. Real file sizes depend heavily on image complexity (noise, gradients, details).
The Planning Guide: Image Budgeting Calculator
The Adiminium Image Size Estimator is a "What If?" calculator for digital asset managers. Before you even open Photoshop or send a brief to a photographer, you need to know how large the files will be. This helps in budgeting for server storage cost, bandwidth limits, and performance goals.
The Math Behind Pixels
An image is just a grid of data.
Raw Size = Width × Height × Color Depth.
Example: A 1920x1080 screen has about 2 million pixels.
At 24-bit color (standard), that's 2 million × 3 bytes (R, G, B) = ~6 Megabytes (MB).
So why are web images usually only 200KB? Compression.
Compression Types Explained
- JPEG (Lossy): The champion of the web. It uses math to discard invisible data. We estimate strict optimization (10:1 to 20:1 ratios) which is typical for web use.
- PNG (Lossless): Preserves every pixel perfect. It works like a ZIP file for images. Complex photos don't compress well in PNG (maybe 2:1 ratio), but simple logos/line-art compress amazingly (50:1). Our estimator assumes a "Complex Photo" worst-case scenario.
- WebP (Modern): Google's modern format. It typically shaves another 30% off JPEGs for the same quality.
Use Cases
- Server Budgeting: "If we have 1 million users upload 1 avatar each, how much S3 storage do we need?" (Input 400x400px -> Multiply result by 1M).
- Performance Budget: "Can we afford a full-screen video background?" (Input 1920x1080 -> See that uncompressed frames are huge, realize you need heavy compression).