Image File Size Calculator – Storage per Photo
Calculate image file size from resolution, color depth, and compression.
About This Calculator
Calculate image file size from resolution, color depth, and compression. Use the calculator above for instant results.
Worked Examples
- Raw: 34.3 MB | JPEG: ~1.7 MB | PNG: ~17 MB
Answer: Raw 34 MB / JPEG ~2 MB
- Raw: 5.9 MB | JPEG: ~0.3 MB | PNG: ~2.9 MB
Answer: Raw 6 MB / JPEG ~300 KB
- 4032×3024 raw: 35 MB | JPEG saved: ~3-5 MB
Answer: ~3-5 MB JPEG typical
Who Uses This Calculator?
Understand storage requirements.
Optimize image sizes for web.
Plan media storage capacity.
Budget photo storage.
Common Mistakes to Avoid
❌ JPEG compression varies
JPEG quality 60-90 gives vastly different file sizes. These are estimates — actual sizes vary by subject complexity.
❌ RAW vs JPEG
Camera RAW files are typically 25-50 MB for 24MP cameras. Much larger than JPEG but preserve full image data.
Frequently Asked Questions
Why do 12MP phones take 3MB photos?
JPEG compression removes imperceptible detail. 12MP raw = ~35 MB, but JPEG at quality 85 compresses to ~3-5 MB with minimal visible loss.
Best format for web?
WebP: best compression + quality. JPEG: widest compatibility. PNG: for images with transparency. AVIF: best compression, newer support.
How many photos per GB?
At 3 MB JPEG average: ~333 photos/GB. At 30 MB RAW average: ~33 photos/GB.