JPEG file size estimator
Estimate JPEG output size from resolution, quality and color settings.
Actual JPEG size depends on your real pixel data's entropy, which no formula can know without encoding the actual image. This is an approximation, not the exact byte count a real encoder would produce. The preview is a simulated pattern reflecting your settings, not your actual photo.
Only applies to RGB images.
1 = flat/simple, 10 = noisy/highly detailed. See guide below.
Pixel entropy guide
| 1-2 | Flat colors, icons, logos |
| 3-4 | Gradients, screenshots, simple illustrations |
| 5-6 | Typical photo: portraits, product shots |
| 7-8 | Busy photos: foliage, crowds, texture |
| 9-10 | Noisy/high detail: grain, fur, gravel, low light |
Estimated file size
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Simulated preview
100%