How it works
This is uncompressed raster data, not the final JPG/PNG/HEIC file size. Metadata, alpha channels and compression affect actual disk usage.
FormulaRaw bytes = width × height × channels × bits/channel ÷ 8.
TECHNOLOGY / MEDIA PRODUCTION
← All toolsImage file size (uncompressed)
Calculate raw pixel-data size before JPEG, PNG or other compression.
Your numbers
Loading calculator...
◈ Your values stay in your browser. No account needed.
YOUR RESULT
Enter your numbers to see a result.
Image file size (uncompressed): a worked example
With image width (pixels) 4,000, image height (pixels) 3,000, number of channels 3 — RGB, bits per channel 8-bit, the uncompressed image size is 36 MB.
| Image width (pixels) | 4,000 |
|---|---|
| Image height (pixels) | 3,000 |
| Number of channels | 3 — RGB |
| Bits per channel | 8-bit |
| Uncompressed image size | 36 MB |
|---|---|
| Megapixels | 12 MP |
| Size in MiB | 34.33 MiB |
| Bytes | 36,000,000 bytes |
Amounts are shown in US dollars for illustration. Choose your own currency in the calculator above; it labels amounts and does not convert them.
Make the numbers useful
Try changing one input at a time. The live result helps you see which assumption has the greatest effect.
Use Save scenario A, change an input, and compare both results side-by-side. You can also share your settings using a link.
Modelled results are estimates. Independently check decisions involving health, finances or safety.
Frequently asked questions
How is the image file size (uncompressed) calculated?
Raw bytes = width × height × channels × bits/channel ÷ 8. This is uncompressed raster data, not the final JPG/PNG/HEIC file size. Metadata, alpha channels and compression affect actual disk usage.
What does the image file size (uncompressed) example show?
With image width (pixels) 4,000, image height (pixels) 3,000, number of channels 3 — RGB, bits per channel 8-bit, the uncompressed image size is 36 MB. Megapixels: 12 MP; Size in MiB: 34.33 MiB; Bytes: 36,000,000 bytes.
What assumptions and limits apply?
This is an estimate based on the inputs and assumptions shown on this page, not professional advice. Check anything with financial, health or safety consequences independently.
Is my data private?
Yes. Calculations run in your browser and your numbers are not sent to a server. A share link contains the inputs you choose to share, so check it before sending it to anyone.