Stop Loss & Take Profit Calculator

Sizing a trade from your stop-loss is the discipline that separates consistent traders from account blow-ups: instead of picking a position size and hoping, you fix the dollars you are willing to lose and let the stop distance decide the size. The chain is exact:

risk $ = account × risk %  ·  position = risk $ / |entry − stop|

Worked example: a $10,000 account risking 1% ($100) with an entry at $100 and a stop at $95 has a per-unit risk of $5, so the position is 100 / 5 = 20 units — a $2,000 notional position. If the stop is hit you lose exactly $100; the position size fell out of the risk, not the other way around. A tighter stop lets you size larger for the same dollar risk, which is why stop placement and position size can never be decided independently. This is the same risk-based logic the lot size calculator applies to forex lots.

The risk/reward ratio is the reward distance divided by the risk distance — but on its own it says nothing about whether a trade is worth taking. A 3:1 setup is a losing strategy if it only hits target 20% of the time; a 1:1 setup wins money at any win rate above 50%. R:R and win rate are two halves of the same equation, and the risk/reward calculator maps the break-even win rate for any ratio. Before trusting a target, pressure-test the pair:

The risk of ruin calculator shows how a given risk-per-trade survives a losing streak, and the Kelly criterion calculator converts your edge into the growth-optimal risk fraction — often well below the 1–2% many traders default to. Sizing every trade off the stop, at a consistent risk percentage, is what makes those survival numbers hold.