Dragon7108andClaude Opus 4.8
18f22591a8
ComfyUI aspect-ratio node — preset + custom ratios, base-resolution scaling, configurable divisible_by alignment (8/16/64…), and a live in-node preview. GPL-3.0. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
ComfyUI-QuickRatio
A simple utility node for ComfyUI that provides quick aspect ratio calculations for image generation.
Features
- Preset Ratios: Common aspect ratios including 16:9, 4:3, 1:1, portrait variants, and ultrawide formats
- Custom Ratios: Support for custom width:height ratios
- Smart Scaling: Automatically scales dimensions based on a base resolution
- Configurable Alignment: Snaps the computed dimension to a
divisible_byvalue (default 8) — bump it to 16 for Flux, 64 for models that need it, etc.
Usage
- Select a preset ratio from the dropdown or choose "custom"
- Set your base resolution (the larger dimension will use this value)
- Set
divisible_byto match your model's alignment (default 8; e.g. 16 for Flux) - For custom ratios, specify width and height ratio values
- The node outputs width and height as integers
Available Presets
Outputs below are at the default base resolution of 1024 (which sets the longer side) and the default divisible_by of 8. The shorter side is snapped to divisible_by, so it can land a few pixels off the exact ratio — e.g. 21:9 gives 440, not 438.9. Raise divisible_by (16, 64, …) for models that need it, and change the base resolution to scale every preset proportionally.
| Preset | Description | Output @ base 1024 (W×H) |
|---|---|---|
1:1 |
Square | 1024 × 1024 |
11:17 |
Tabloid/ledger, portrait | 664 × 1024 |
16:9 |
Widescreen | 1024 × 576 |
9:16 |
Vertical / mobile | 576 × 1024 |
4:3 |
Classic | 1024 × 768 |
3:4 |
Portrait classic | 768 × 1024 |
21:9 |
Ultrawide | 1024 × 440 |
9:21 |
Vertical ultrawide | 440 × 1024 |
3:2 |
Photography | 1024 × 680 |
2:3 |
Portrait photography | 680 × 1024 |
5:4 |
Large format | 1024 × 816 |
4:5 |
Portrait large format | 816 × 1024 |
custom |
Your own width:height ratio | depends on inputs |
Installation
Via ComfyUI-Manager: "Install via Git URL" → https://github.com/Dragon7108/ComfyUI-QuickRatio
Manual:
cd ComfyUI/custom_nodes
git clone https://github.com/Dragon7108/ComfyUI-QuickRatio
Restart ComfyUI. No extra dependencies.
License
GPL-3.0 — ComfyUI is GPL-3.0 and this node integrates with it, so it matches.