Image File Size Calculator
Estimate uncompressed raw bitmap and compressed image payload file sizes.
Interactive Image Cropper Studio
Supports PNG, JPG, WebP, GIF, BMP, SVG. Processed 100% locally inside your browser.
About Image File Size Calculator
The Uncompressed & Compressed Image File Size Estimator calculates raw bitmap memory footprint ($W \times H \times \text{Bit Depth}$) and predicts compressed file sizes across JPEG, PNG, WebP, and AVIF formats based on compression quality ratios.
How to Use Image File Size Calculator
Step 1
Enter pixel width and height, or select a resolution preset (1080p, 4K, 8K).
Step 2
Select color depth (24-bit RGB or 32-bit RGBA).
Step 3
Inspect the comparative file size table across all image formats.
Step 4
Click "Copy Report".
Practical Use Cases for Image File Size Calculator
Web Application Bandwidth & CDN Budgeting
Estimate total bandwidth requirements and storage costs for hosting image galleries across modern WebP and AVIF formats.
RAM Buffer Planning for Canvas & WebGL
Calculate the uncompressed GPU memory buffer required to decode high-resolution 4K and 8K images inside browser canvas elements.
Input & Output Examples
Estimating File Size for 4K Image (3840x2160)
Dimensions: 3840 x 2160 px, Color Depth: 24-bit (RGB)
Raw Bitmap RAM: 24.88 MB | Est. JPEG (80%): 1.25 MB | Est. WebP (80%): 820 KB | Est. AVIF (80%): 540 KB
Key Features & Performance
- ✓Calculates uncompressed raw bitmap size: $\\text{Bytes} = \\frac{W \\times H \\times \\text{Bits Per Pixel}}{8}$.
- ✓Simulates compression estimates for JPEG, PNG-24, PNG-8, WebP, AVIF, and GIF.
- ✓Supports color depths: 8-bit grayscale, 16-bit high color, 24-bit true color (RGB), and 32-bit (RGBA with Alpha).
- ✓Calculates page load time benchmarks across 4G, 5G, and Broadband connections.
- ✓100% Client-Side calculation.
- ✓1-Click Copy size estimate report.
Key Terminology & Definitions
Uncompressed Bitmap Size
The raw memory buffer required by the browser or GPU to display an image ($W \\times H \\times \\text{Bytes per Pixel}$), regardless of disk compression.
Color Depth (Bit Depth)
The number of bits used to represent the color of a single pixel (e.g. 24-bit = 8 bits each for Red, Green, and Blue).