Image File Size Calculator (Uncompressed)
Estimate the raw data size of an image before compression: width × height × bits per pixel. Useful for memory planning, RAW/TIFF estimates and image-sequence budgets.
Why real PNG and JPEG files are smaller
This tool calculates the raw pixel data: width × height × bits per pixel ÷ 8. PNG applies lossless compression and JPEG applies lossy compression, so their file sizes depend on image content and quality settings. A 24-megapixel RGB image contains about 72 MB of raw data, but a typical high-quality JPEG of the same image is 5–15 MB.
Frequently asked questions
How big is an uncompressed 6000 × 4000 RGB image?
6000 × 4000 × 24 bits ÷ 8 = 72,000,000 bytes, about 68.7 MiB (72 MB in decimal). This equals the size of an uncompressed TIFF or BMP before metadata.
Can you predict the JPEG or PNG file size exactly?
No. JPEG size depends on compression quality and image detail; PNG size depends on colour complexity. Treat any "average" multiplier as a rough guide only. This tool gives the exact uncompressed baseline instead.
Is this the same as the file size my camera produces?
Not usually. Cameras store compressed JPEGs or proprietary RAW formats that use their own compression and metadata, so the file on your card is smaller than the raw pixel data.