Uncompressed Image Size Calculator

Use Uncompressed Image Size Calculator to work out uncompressed file size for image resolution quickly and clearly. Enter Pixel Width, Pixel Height, and Bits Per Pixel, and the calculator uses those values to show uncompressed file size. This is useful when working with image resolution and file sizes, pixels, text, transfer rates or digital units need to be compared consistently. Real devices, networks and software can add limits or overhead that are not represented by a simple numerical input. For the clearest answer, use the real values for the image resolution case you want to check rather than approximating them. Read the worked example on the Uncompressed Image Size Calculator page if you want to check how the entered values lead to uncompressed file size before using your own figures.

How to use Uncompressed Image Size Calculator

To use Uncompressed Image Size Calculator, start with the values that apply to your image resolution case. Enter the whole-number value for Pixel Width, then enter the whole-number value for Pixel Height and enter the whole-number value for Bits Per Pixel. Run the calculation to see uncompressed file size, then compare the answer with the values you entered before using it. Keep proportional resizing enabled when you want to preserve the original aspect ratio rather than stretch the result. If you want to compare two image resolution cases, change only the value you are testing so the difference in uncompressed file size is easy to understand. Use the actual source values where possible rather than rounded guesses, especially when a small input change could noticeably affect uncompressed file size.

Why use this tool?

Uncompressed Image Size Calculator is useful when image resolution involves digital values that are easy to confuse, such as file size, pixels, bitrate, transfer speed or text length. It brings the relevant values into one calculation so you can compare formats, sizes or technical limits more consistently. This is helpful for quick planning before exporting, uploading, downloading or designing digital content. Because the calculation is based on Pixel Width, Pixel Height, and Bits Per Pixel, you can see which values need to change when you want to test another case. Because Uncompressed Image Size Calculator focuses only on image resolution, you can change one input at a time and see how that affects uncompressed file size without changing the basis of the comparison.

How the calculation works

Uncompressed Image Size Calculator multiplies width by height by bits per pixel, divides by eight to get bytes, then show the result in bytes and a human-readable KB/MB/GB value. The formula combines Pixel Width, Pixel Height, and Bits Per Pixel directly, with each value playing a specific part in the arithmetic. When proportional resizing is used, the original aspect ratio is preserved so the image or shape is not stretched; cropping is a separate choice. The result gives uncompressed file size from the digital values entered, providing a consistent basis for comparing files, screens, media or transfer settings.

Example

For example, enter Pixel Width = 10, Pixel Height = 5, and Bits Per Pixel = 12. With those values, the calculator returns 75 B for uncompressed file size. This works by multiplying width by height by bits per pixel, divide by eight to get bytes, then show the result in bytes and a human-readable KB/MB/GB value, which gives the displayed uncompressed file size.

Practical tip

For Uncompressed Image Size Calculator, use the real values for Pixel Width, Pixel Height, and Bits Per Pixel rather than rounded guesses when a small input change could affect the answer. Keep the same units and assumptions whenever you compare two results from this tool. For image resolution, compare uncompressed file size with the limits of the actual device, platform or service because real systems can impose constraints beyond the arithmetic. If uncompressed file size looks surprising, recheck the original inputs before changing any assumptions.