Set the loss
Choose the maximum account percentage you are prepared to lose if the stop is hit.
Free tools for disciplined traders
Know the risk before you place the trade.
Calculate position size, prop-firm drawdown room and trade R-multiple in seconds. No sign-up and nothing to download.
For planning and education only. Not financial advice.
PRE-TRADE RISK PLAN
ACCOUNT£10,000
RISK1.0%
RISK AMOUNT£100
REWARD : RISK2.5R
Define risk first. Let position size follow.
3free calculators
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Trading calculators
Choose the number you need.
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Position Size Calculator
Works for shares, crypto, forex units and contracts when you enter the correct contract multiplier.
What is contract multiplier?
Use 1 for one share, coin or unit. For derivatives, enter the monetary value of one full price point per contract using your broker’s specification.
Your risk plan
50units / contracts
- Risk amount
- £100.00
- Stop distance
- 2.00
- Position notional
- £5,000.00
- Reward-to-risk
- 2.50R
At the stop, the planned loss is approximately £100.00 before fees and slippage.
Prop Firm Drawdown Calculator
See how much room remains before typical total and daily loss limits.
Remaining room
£8,000total drawdown buffer
- Total loss used
- 20.0%
- Daily buffer
- £4,000
- Buffer after next risk
- £3,500
- Planning status
- Within limits
Rules vary by firm. Check whether limits use balance, equity, trailing drawdown or end-of-day calculations.
R-Multiple Calculator
Measure the result relative to the amount you planned to risk.
Trade result
+2.50RR-multiple
- Profit / loss
- £250.00
- Account impact
- +2.50%
- Classification
- Winner
Track R consistently to compare trades across different account sizes and markets.
A simple pre-trade routine
Three decisions before every entry.
Place the stop logically
Base the stop on your trade setup, then let the calculator determine position size.
Record the outcome
Track planned risk, actual P&L and R-multiple so your review uses comparable data.
Position sizing explained
Why position size matters
Position size connects your stop-loss distance to the cash amount at risk. A wider stop means fewer units. A tighter stop means more units, while the planned account risk stays the same.
The formula is: risk amount ÷ (entry-to-stop distance × contract multiplier). Fees, spread, gaps and slippage can make the actual result different, so the calculator is a planning estimate.
Go beyond one calculation
Plan, record and review every trade.
The Trader Performance Toolkit includes a risk calculator, trading journal, dashboard and pre-trade checklist in one spreadsheet.