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Prop firm true drawdown leverage & real risk calculator

A “$100,000” prop account with a $3,000 loss limit is a $3,000 risk account; see what yours really is.

Updated 22 October 2026. Runs in your browser; nothing you type is uploaded.

Example: 100K headline, $3,000 to lose−3% needs +3.1%

Try a worked example

The size the firm advertises

In dollars

1.00% of the headline size

Losses in a row

0 if there is none

The most all open trades may be down at once; 0 if there is none

0 before any withdrawal; taking it off the usable drawdown is an approximation

Real risk capital $3,000 on a $100,000 account (33.3×)

Too large: 1.00% of the account is 33.3% of your real drawdown, so 3 losses end the account

Real risk capital

$3,000

The $100,000 headline is 33.3× your real loss limit

Risk per trade

33.3%

of the usable drawdown (1.00% of $100,000)

Losses to breach

3

2 in one day reach the $1,800 daily limit

No open-loss limit

Risk per trade for 8 losses

$375

0.38% of the $100,000 headline

8 full stops at this size use the whole drawdown; stay a little under

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Writing about it instead? Cite the method and link the page:

The math: UsableCapital = MaxDrawdown − LockedBuffer · TrueRisk% = RiskPerTrade ÷ UsableCapital

Read the full guide

Why is a $100,000 prop firm account really a $3,000 account, and why does 1% risk blow challenges?

As detailed in our prop-firm risk research and position sizing breakdown, a prop-firm account with a $100,000 headline balance and a $3,000 maximum loss limit (or a 6% trailing drawdown with a 1% buffer kept after a withdrawal) does not give you $100,000 of risk capital. It gives you $3,000 to $5,000 of usable drawdown, and a 1% open-loss limit, where a firm has one, caps how far all your open trades may be down at once at $1,000. Risking a textbook "1% of $100,000" ($1,000 per trade) actually bets 20% to 33.3% of your entire account life on a single trade, so a normal 3-trade losing streak ends the account.

Method and privacy

Method: Usable drawdown capital = maxDrawdownDollar − bufferKeptAfterAWithdrawal (an approximation; 0 before any withdrawal). True drawdown risk % = plannedRiskDollar ÷ usableDrawdownCapital × 100. Losses to breach = ceil(usableDrawdownCapital ÷ risk), the full stop that reaches the limit; losses to the daily limit = ceil(min(usable, dailyLossLimit) ÷ risk). An open-loss limit caps the floating loss of all open trades at once, so it gives the trades that can sit at their stop together, ceil(openLossLimit ÷ risk), not a daily budget. Risk for an N-loss streak = usableDrawdownCapital ÷ N; N full stops at that size use the whole drawdown.

Calculations run entirely in your browser — nothing you type is uploaded. Your last numbers stay in this browser so you can pick up where you left off; Forget them clears them. A link with your numbers carries them after the # sign, which browsers do not send to servers, and the page takes them out of the address before any analytics loads. Copy and download actions save your calculation locally. The site may record coarse tool actions under its privacy policy, without inputs, results, file contents or filenames.

Common questions

Why does risking 1% per trade blow a $100,000 prop firm challenge so quickly?

Because 1% of the $100,000 headline balance is $1,000—and on a $100,000 account with a $3,000 trailing Maximum Loss Limit (or a 3% daily loss limit), $3,000 is your entire loss allowance. Risking $1,000 per trade is actually risking 33.3% of your true risk capital on every trade, meaning a routine 3-trade losing streak terminates the account.

How much should I actually risk per trade on a $50,000 or $100,000 prop firm account?

Size your trades as a percentage of your usable drawdown (typically 8% to 12.5% of your max loss limit, so it takes 8 to 12 consecutive full stops to breach), not the nominal account size. On a $100,000 account with a $3,000 MLL, surviving an 8-loss streak means risking a little under $375 per trade (0.375% of the headline $100,000), since 8 full stops at $375 add up to the whole $3,000.

How do 1% locked buffers and -1%/-2% open-loss shields reduce my real risk capital?

If a firm locks your 6% trailing drawdown at starting balance ($100,000) and requires keeping a 1% buffer ($1,000) in the account on withdrawal, that buffer comes off what you can lose after the withdrawal. A -1% ($1,000) open-loss limit caps how far all your open trades may be down at once: on Goat Funded Trader's Instant HERO touching it is a hard breach, Blue Guardian Instant's Guardian Shield cuts the split, and AquaFunded now applies its -1% per trade, with strikes. Under a $1,000 limit, a trade risking $1,000 reaches it on its own stop, and two trades open at $500 each reach it together—so $200 to $250 per trade (0.20%–0.25% nominal) leaves room for several open positions.

Rehearse the rules before they cost a payout

  • Prop challenge practice Trade a prop-style challenge on real gold and Bitcoin replays with the daily-loss and drawdown rules switched on. The first challenge day is free.
  • Prop Firm Challenge Toolkit (.pine) Your daily-loss limit and drawdown floor (static, trailing end-of-day or trailing intraday) on the TradingView chart, with a sizer that turns risk % and stop into a size. It uses the numbers you enter; it does not read your broker. $29 once.

Goes deeper

Limits and trading risk

These tools calculate from your inputs, supported historical records or explicitly labelled teaching examples. They do not verify a live account, predict future returns or confirm that a broker or prop-firm rule has been met. Missing costs, floating losses and changed market conditions can materially change outcomes. Trading can lose the capital committed to it; check the stated method and your account specifications.

Read the risk disclosure