Compression Calculator

Category: Technology
- October 26, 2025
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Calculate file sizes, compression ratios, and storage requirements for different compression formats and quality settings.

File Compression Calculator

Size of the uncompressed file
Higher ratio = smaller file size
Different formats have different typical compression ratios
Compression effectiveness varies by file type

Audio/Video Compression Calculator

minutes
kbps

Image Compression Calculator

px
px
80%
Lower quality = smaller file size
For calculating batch compression

Storage Requirements Calculator

Understanding Compression

Data compression reduces file size by eliminating redundancy and representing information more efficiently. This saves storage space and reduces transmission time.

Compression Types
  • Lossless Compression: No information is lost during compression. Original data can be perfectly reconstructed (ZIP, PNG, FLAC).
  • Lossy Compression: Some information is permanently discarded to achieve higher compression ratios (JPEG, MP3, MP4).
Compression Ratio

Compression ratio is expressed as X:Y, where X represents the original size and Y represents the compressed size. For example, a 4:1 ratio means the original file was 4 times larger than the compressed version.

  • Space Saving: Calculated as (1 - 1/ratio) × 100%. For example, a 4:1 ratio saves 75% of space.
  • Compression Factor: Another way to express compression, calculated as original size ÷ compressed size.
Typical Compression Ratios
  • Text Documents: 2:1 to 8:1 with lossless compression
  • Images: 10:1 to 20:1 with lossy compression (JPEG), 2:1 to 5:1 with lossless (PNG)
  • Audio: 10:1 to 12:1 with lossy compression (MP3), 2:1 to 3:1 with lossless (FLAC)
  • Video: 20:1 to 200:1 with lossy compression, depending on quality

Disclaimer: This calculator provides estimates based on typical compression rates. Actual compression results may vary based on data characteristics, algorithm implementation, and compression settings. For precise measurements, use dedicated compression software on your actual files.

Estimate compressed file sizes, space savings, and download times for files, images, audio, and video with this easy-to-use compression calculator. Compression Calculator is part of Technology Calculators. Explore 24 related tools, including .