About UmaCalc
A free, independent suite of Uma Musume Pretty Derby tools built by fans, for trainers.
UmaCalc is a free, fan-made collection of Uma Musume Pretty Derby tools β stamina calculator, race simulator, inheritance, training, affinity and skill database β plus guides. It is independent, requires no login, and exists to make career-mode planning accessible in English, Japanese, Korean and Chinese.
Key Facts
- Independent, fan-made project β not affiliated with Cygames
- Free to use, no login, no download
- Available in English, Japanese, Korean and Chinese
- Formulas based on community datamined values
- Updated after major game patches
Why we built this
Uma Musume's best planning knowledge lives in scattered spreadsheets and Japanese wikis that are hard to use, often outdated and rarely translated. Newer and international trainers are left guessing.
What we do
We turn the community's datamined knowledge into simple, instant tools that anyone can use in their browser, in four languages, for free. We update after major patches and keep the interface fast and ad-light.
Frequently Asked Questions
Is UmaCalc official?
No. UmaCalc is an independent fan project and is not affiliated with or endorsed by Cygames, the developer of Uma Musume Pretty Derby.
Is it really free?
Yes. All tools are free and run in your browser. The site is supported by unobtrusive ads.
How are the numbers sourced?
From community datamined stat and skill values, updated after major balance patches.