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Max daily loss sizing

A daily-loss cap is a session clock. Dividing that cap by the dollar risk of one trade gives the number of same-size losses the session can absorb before the cap binds. The widget below also runs the seeded engine with that cap as a field.

Max Drawdown in this widget is a static floor from starting balance (v1) — a fixed floor measured from your starting balance, not a floor that ratchets upward with a new equity peak. The session-cap arithmetic is separate; the widget's total floor is still this static Max DD.

Daily loss limit in the widget is the session cap. The table below is the same cap divided by per-trade dollar risk.

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Same engine at the same free accuracy — save a rule set, add a stop, or import a history. The stamped file is written after that run, not from this typed-average result.

The mechanism

On a $50,000 account, 1% risk is $500 per trade. A 4% daily-loss cap is $2,000. Same-size losses the session can absorb: $2,000 ÷ $500 = 4.

QuantityFormulaValue
Dollar riskbalance × risk%$50,000 × 1% = $500
Daily capbalance × daily%$50,000 × 4% = $2,000
Same-size losses to the capdaily cap ÷ dollar risk4

If losses are not the same size, the count is no longer an integer identity — the widget simulates the entered average loss instead.

Cap vs total floor

A daily cap can bind before the total drawdown floor does. That is a sequencing fact, not a ranking of which rule "matters more." The full tool applies both when a firm publishes both; this page's widget applies the personal-rule set, including the daily-loss field you enter.

The free personal-rule engine currently models a stated Max Drawdown allowance as a fixed floor measured from your starting balance, not a floor that ratchets upward with a new equity peak — methodology.

FAQ

How is max daily loss converted into a trade count?
Divide the dollar daily-loss cap by the dollar risk of one trade. The result is the number of identical losses that reach the cap. Unequal losses need a simulation, which is what the widget runs from the entered average loss.
Does a daily cap replace a total drawdown floor?
No. They are different clocks. A session can hit the daily cap while the total floor is still distant, or the reverse.
Does this tell me how much to risk?
No. It reports the arithmetic of a cap you enter against a size you enter. It does not instruct a size.

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<iframe
  src="https://propsurvival.com/embed/personal-rules?src=embed-max-daily-loss-sizing"
  width="100%"
  height="700"
  style="border:0"
  loading="lazy"
  title="Max daily loss calculator — PropSurvival">
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<p class="ps-attribution" style="margin:6px 0 0;font:11px system-ui,-apple-system,sans-serif;color:#82857F">Data: <a href="https://propsurvival.com/research/prop-firm-rules-census-2026?utm_source=embed&utm_medium=widget&utm_campaign=atif" target="_blank" rel="noopener">PropSurvival prop-firm rules census</a> · CC BY 4.0</p>
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Paste on your own page — the pasted block includes a crawlable attribution link to the CC BY 4.0 PropSurvival firm-rules census (the license's attribution condition, not a courtesy — keep it visible), plus the in-widget via PropSurvival link. Loads are counted as first-party /e/ beacons only — no third-party analytics.

Run it against your own numbers

The same engine, unlimited runs, at the same free accuracy as this page's calculator — open the full personal rule editor to save a rule set, add a profit goal or daily loss stop, or import a trade history.

Open the personal rule editor — free, full accuracy →

Rules and outcomes vary by firm and by trader; nothing on this page is investment or trading advice, and PropSurvival is not affiliated with, endorsed by, or sponsored by any prop trading firm. This calculator models a stated rule set — it does not predict market outcomes.