Image Token Calculator Online — GPT-4o, Claude & Gemini Vision Tokens
Free image token calculator online: estimate GPT-4o, Claude, and Gemini vision tokens from width × height or an upload. Plan multimodal cost before you call the API—runs in your browser.
Need an image token calculator?
Multimodal APIs bill images as tokens—not just pixels. Spoold's Image Token Calculator estimates vision tokens for GPT-4o, Claude, and Gemini from an upload or width × height so you can plan cost before the request leaves your laptop.
Open the image token calculator →
What is an image token calculator?
An image token calculator converts image size (and sometimes detail settings) into the token count your provider will charge for vision input. Text tokens and image tokens add up in one request—so a 4K screenshot can dwarf a short prompt. Use Spoold vision tokens for planning estimates; always confirm billing rules on the vendor docs.
Example: size → tokens (illustrative)
Providers differ (tile grids vs scaled pixels). As a planning sketch for a typical “high detail” style path:
| Image | Why it matters |
|---|---|
| 512×512 | Small avatar / icon crop — usually the cheapest vision input. |
| 1280×720 | Common UI screenshot — often several× a short caption in tokens. |
| 3840×2160 | 4K capture — often dominates the bill; resize before batch jobs. |
Enter the exact width × height (or upload) in Spoold to see the estimate for your chosen provider preset.
When to estimate vision tokens
Product screenshots
UI QA agents that send full-page captures—check whether detail=high will blow the budget.
Doc / PDF page images
Rasterized pages vary wildly by DPI. Estimate before batching hundreds of pages.
Compare providers
GPT-4o, Claude, and Gemini tile or scale differently. Same image ≠ same token bill.
Cost alerts
Pair with the text token calculator for prompt + image totals.
How to use Spoold
- Open /tools/vision-tokens.
- Upload an image or type width × height.
- Pick the provider / detail preset that matches your API call.
- Read the estimated vision token count (planning only).
- Add caption / system text tokens in the text calculator.
Tip: resize before you ship
Downscaling a 4000px screenshot often cuts vision tokens more than trimming the caption. Estimate first, then decide.
Related guides
Related search terms
Frequently asked questions
Is this a billing quote?
Does my image upload leave the browser?
Why do providers disagree on the same image?
Should I count the caption here too?
Does file format (PNG vs JPEG) change tokens?
Estimate vision tokens now
Upload or set dimensions in the image token calculator.
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