Free Tool

NanoBanana2 Resolution Calculator

Calculate output dimensions from aspect ratio and resolution tier, analyze existing dimensions, or estimate credits, generation time, and file sizes. Free, no login required.

Experimental data — All values are based on testing with NanoBanana2 on Comfy Cloud (H100 GPU) in early March 2026. Credits, generation times, and file sizes may vary based on prompt complexity, server load, and ComfyUI version. YMMV.

Output Dimensions

2048x2048px

4.2 megapixels (4,194,304 total pixels)

Dimensions are rounded to the nearest multiple of 64 (NanoBanana2 requirement)

Quick Reference: Resolution Tiers

TierPixel Budget1:1 DimensionsCreditsTimeFile Size (PNG)
1K1,048,5761024 x 102414.2–14.913–23s1.6–1.9 MB
2K4,194,3042048 x 204814.2–14.935–53s4.3–8 MB
4K16,777,2164096 x 409625.3–2666–77s20.9–22.7 MB

How NanoBanana2 Resolution Works

NanoBanana2 uses a pixel budget system rather than fixed dimensions. Each resolution tier (1K, 2K, 4K) defines a total number of pixels, and the model distributes them according to your chosen aspect ratio.

The formula is straightforward: given a total pixel budget P and aspect ratio W:H, the output dimensions are:

width = round_to_64(sqrt(P * W/H))
height = round_to_64(P / width)

All dimensions are rounded to the nearest multiple of 64, which is a requirement of the underlying diffusion architecture. This means a 16:9 image at 2K resolution produces 2752 x 1536 pixels, not an exact 16:9 ratio.

The 1K tier allocates approximately 1 megapixel (1,048,576 pixels), 2K allocates 4 megapixels, and 4K allocates 16 megapixels — each tier is a 4x increase.

Want to see NanoBanana2 in action?

Read the complete guide to generating images with NanoBanana2 on ComfyUI — covering prompting strategies, resolution settings, and real-world examples.

Read the NB2 GuideView Example Gallery