Position size & risk calculator
Decide what you’re willing to lose on this one trade (a percent of the account), then enter your entry and stop-loss — the calculator returns the whole-share count that puts your worst case right at that budget, along with position value, the actual risk after rounding to whole shares, and (when you add a target) the reward-to-risk. It works long or short; for a long, it flags when the risk-based size costs more than your cash. Every number is a disclosed division of what you typed — not investment advice.
계좌 규모
거래당 리스크 (%)
진입가
손절가
목표가 (선택)
계좌 규모, 리스크 %, 진입가, 손절가를 입력하면 계산됩니다.
포지션 사이징은 입력한 숫자에 대한 산술 계산입니다 — 특정 거래의 권유도, 투자 자문도 아닙니다. 손절이 정확히 손절가에 체결된다고 가정하며, 실제 체결은 특히 갭 발생 시 그 가격을 지나칠 수 있습니다.
How the sizing works
- Risk budget = account size × risk % — the dollars you’ve decided you can lose on this trade.
- Risk per share = |entry − stop| (entry − stop for a long, stop − entry for a short); a stop on the wrong side or equal to entry is flagged.
- Shares = floor(risk budget ÷ risk per share) — rounded down to whole shares, so the actual risk at that size is always ≤ the budget, never over.
- For a long on a cash basis: if shares × entry exceeds the account, it’s flagged with the max shares your cash can buy and the risk at that size (a short needs a margin account; this is a risk calc, not a margin check).
- Reward-to-risk = reward per share ÷ risk per share (when a target is set) — a ratio, not a probability of success and not a price forecast.