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Image & Photo Calculators

Image File Size Calculator

Estimated file size for an image from its dimensions, format and compression.

Enter values

Results update as you type.

Result

Estimated file size

7.47 MB

Compressed formats vary a lot with content — a flat sky compresses far smaller than dense foliage.

Total for all images
7.47 MB
In megabytes
7.47
Bits per pixel
5.222
Megapixels
12 MP
Images per GB
137
Upload time at 20 Mbps
3.1 s

About the Image File Size Calculator

Estimated file size for an image from its dimensions, format and compression.

Also known as: photo file size, jpeg size calculator, raw file size, image storage size.

How to use this calculator

  1. Enter width, height, format, number of images and the other fields.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Review the breakdown shown under the main result.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

size ≈ pixels × bits per pixel ÷ 8, scaled by the compression quality

Worked example

Using the values pre-filled in the calculator above:

  • Width = 4,000 px
  • Height = 3,000 px
  • Format: JPEG
  • Quality = 85 %
  • Number of images = 1

the calculator returns:

  • Estimated file size: 7.47 MB
  • Total for all images: 7.47 MB
  • In megabytes: 7.47
  • Bits per pixel: 5.222