# Free tools

> Small, free tools for planning AI dramas, films and ads. No sign-in; they run in your browser on the same data as our public pages.

URL: https://arc.katechon.technology/tools
Updated: 2026-10-18

- [AI video cost calculator](https://arc.katechon.technology/tools/ai-video-cost-calculator): USD and Katechon Arc credits for any clip, episode or series on 20 models, with a 30-episode drama preset from our own films.

## Data behind the tools

The tools read the same checked data files as the rest of this site: the [AI video price index](https://arc.katechon.technology/ai-video-price-index) (list prices quoted 2026-10-17), the [model credit table](https://arc.katechon.technology/models) that the Katechon Arc studio charges from, and the production records of the [films we made](https://arc.katechon.technology/films). When the data is refreshed, the tools change with it.

For questions the tools do not answer, see the [answers library](https://arc.katechon.technology/answers), for example [how much an AI short drama costs](https://arc.katechon.technology/answers/how-much-does-it-cost-to-make-an-ai-short-drama) or [the cheapest AI video model per second](https://arc.katechon.technology/answers/what-is-the-cheapest-ai-video-generator).