Free trading calculators.

Simple, honest tools for working out your risk before you place a trade. No sign-up, no email, no catch.

Risk / reward ratio

Work out your reward-to-risk and the win rate you'd need to break even.

How much to buy so a single trade only risks what you decided to risk.

Estimate where leverage wipes out your position, before you use it.

Chartilo teaches you when to use them, with lessons and a Decision Lab that grades your process, not your luck.