Image File Size Calculator
Estimate the uncompressed size of an image from its dimensions, bit depth and colour channels. Compressed JPEG, PNG and WebP files are usually much smaller.
Estimated uncompressed size
34.33 MB
Bytes: 36,000,000
Megapixels: 12
This is uncompressed data only. Actual JPEG, PNG or WebP files are usually much smaller.
How to use this calculator
1. Enter pixel dimensions. 2. Pick bit depth and channels. 3. Read the uncompressed estimate — compressed files will usually be much smaller.
Formula
Uncompressed bytes = Width x Height x Channels x Bits per channel / 8. Compressed files are usually much smaller.
Frequently asked questions
Why is my JPEG much smaller than this estimate?
This estimate is for uncompressed data. JPEG, PNG and WebP compress that data, often by a large factor, depending on image content and quality settings.