How do you decide position size before entering a trade?

I'm building ZISO AI, a research and risk workflow for retail investors.

We recently added a Position Size Calculator because I noticed many investors ask "what should I buy?" before they have a clear answer to "how much can I buy if I'm wrong?"

The tool takes account size, risk per trade, entry price, and stop loss, then calculates share count, expected loss, risk per share, and whether the setup stays inside the plan.

I'd love feedback from investors and builders:

Do you prefer this kind of tool as: