Uncompressed Image Size Calculator
Estimate uncompressed image size from pixel dimensions, colour channels and bits per channel.
How to use Uncompressed Image Size Calculator
1. Enter Pixel Width, Pixel Height, Bits Per Pixel. 2. This estimates tightly packed raw raster data. Row padding, headers, metadata, compression and separate planes are excluded. Bits per pixel is a positive whole count. 3. Select Calculate or press Enter. 4. Select Copy result to copy the answer, or Reset to clear the form and result.
Why use this tool?
This estimates tightly packed raw raster data. Row padding, headers, metadata, compression and separate planes are excluded. Bits per pixel is a positive whole count.
How the calculation works
Packed raster bytes = ceiling(pixel width × pixel height × bits per pixel ÷ 8). This estimates tightly packed raw raster data. Row padding, headers, metadata, compression and separate planes are excluded. Bits per pixel is a positive whole count. Counts and dimensions use the declared rounding convention; other numbers display up to three decimal places where applicable. Nonzero subsecond durations are labelled. Durations round to the nearest second; nonzero subsecond durations are labelled. File-size output units are decimal. Changing an input label does not convert filled values.
Example
Worked example: Pixel Width = 100; Pixel Height = 100; Bits Per Pixel = 24. Result: 30 KB.
Practical tip
Check the input labels and assumptions against the uncompressed image size task before reusing the number.
Frequently asked questions
What exactly does Uncompressed Image Size Calculator calculate?
Packed raster bytes = ceiling(pixel width × pixel height × bits per pixel ÷ 8).
Which units or counting rules apply?
This estimates tightly packed raw raster data. Row padding, headers, metadata, compression and separate planes are excluded. Bits per pixel is a positive whole count.
Does this inspect, change or upload my files?
This page calculates the entered values or text in the browser. Numeric image/media tools do not transform files. Check the worked example and stated counting basis; the result does not certify device, search-engine or accessibility outcomes.