How this calculator works
This estimates tightly packed, uncompressed pixel data only, rounded to whole bytes. It excludes row padding, metadata and file headers. Actual JPEG or PNG sizes depend on image content and compression and cannot be predicted exactly from dimensions.
The formula
Bytes = ceiling(width × height × bits per pixel / 8)A quick example
1920 × 1080 at 24 bits per pixel requires 6,220,800 bytes, or 6.2208 MB.
How to use this calculator
- Enter the labeled values, using a decimal point for fractions.
- Check the units and assumptions.
- Calculate, review the result and copy it if needed.
A few common questions
How is this result calculated?
Bytes = ceiling(width × height × bits per pixel / 8)
What assumptions should I check?
This estimates tightly packed, uncompressed pixel data only, rounded to whole bytes. It excludes row padding, metadata and file headers. Actual JPEG or PNG sizes depend on image content and compression and cannot be predicted exactly from dimensions.
Can I see a worked example?
1920 × 1080 at 24 bits per pixel requires 6,220,800 bytes, or 6.2208 MB.