What is an average compression ratio for images and video?

Converting uncompressed PNG to optimized WebP often achieves an 80% to 90% reduction (roughly 6:1 to 10:1 ratio). H.264 video compression typically achieves over 50:1 compared to raw video frames.

File & Storage Tools

File Size & Compression Savings Calculator

Accurately compare original vs compressed file sizes. Measure exact byte weight reductions, calculate compression ratios (e.g. 4.2:1), estimate CDN bandwidth savings, and convert seamlessly between base-2 (KiB, MiB) and base-10 (KB, MB) storage standards.

Calculated locally on your device with complete privacy.

File Size Comparison Tool

Everyday utilities, randomizers, time management, conversions, and e-commerce calculators.

Choose a file to compute client-side SHA-256Files are hashed 100% locally in your browser memory via Web Crypto API.

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How to Use File Size & Storage Comparison Tool

Input Original Size

Enter original file weight or upload the original file.

Input Compressed Size

Enter optimized size or upload the optimized file.

Analyze Efficiency

View percentage reduction, compression ratio, and annual CDN bandwidth savings.

About File Size & Storage Comparison Tool

Storage vendors measure capacity in decimal base-10 (1 GB = 1,000,000,000 bytes), while computer operating systems (like Windows) measure RAM and storage in binary base-2 (1 GiB = 1,073,741,824 bytes). This accounts for why a '1 TB' hard drive shows as 931 GB in Windows Explorer.

Key Features

Calculates Size Reduction %: [(Original - Compressed) / Original] × 100
Calculates Compression Ratio (e.g. 3.5:1) and Space Saved multiple
Bandwidth Cost Estimator: models monthly dollar savings across 10k, 100k, and 1M downloads
Dual Standards: Binary (IEC: KiB, MiB, GiB - 1024) and Decimal (SI: KB, MB, GB - 1000)
Interactive visual comparison bar chart

Frequently Asked Questions

A Megabyte (MB) is 1,000,000 bytes (1000²), commonly used by hard drive manufacturers and networking hardware. A Mebibyte (MiB) is 1,048,576 bytes (1024²), used by computer operating systems.

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