Portfolio Risk Exposure Calculator
Add up the risk across every open position: what the account loses if every stop is hit, and which position carries most of it.
Last reviewed
·Free · No sign-up · Runs in your browser
Risking one percent per trade sounds disciplined until there are eight positions open at once. The account is then risking eight percent, and if those positions move together it is effectively risking eight percent on a single idea.
This adds it up. Enter each open position with its entry, stop and quantity, and it reports the total loss if every stop is hit, the total capital deployed, and which position carries the largest share of the risk.
Result
Total open risk
3.99%
- Loss if every stop is hit
- $2,395
- Total position value
- $46,691
- Exposure as a share of the account
- 77.82%
- Open positions
- 4
- Average risk per position
- $599
- Largest risk
- DDD
- Largest risk as a share of the account
- 1%
- Equity if every stop is hit
- $57,605
This tool is for informational and educational purposes only. It is not financial or investment advice, and past performance does not guarantee future results.
Total open risk assumes every stop fills at the stated price. Gaps, slippage and illiquid markets can produce a worse outcome than the number shown.
Positions that move together do not diversify risk. Several correlated trades sized at one percent each can behave like a single much larger position.
Risk by position
| Position | Risk if stopped | Percent of account | Position value |
|---|---|---|---|
| AAA | $600 | 1% | $10,625 |
| BBB | $600 | 1% | $11,800 |
| CCC | $595 | 0.99% | $8,330 |
| DDD | $600 | 1% | $15,936 |
How to use the portfolio risk exposure calculator
- Enter your account size.
- Add one line per open position: symbol, entry price, stop price, quantity.
- Read the total open risk as a percentage of the account.
- Check whether the positions are genuinely independent - if not, treat the total as understated.
What people use this for
- Checking total exposure before adding another position.
- Finding the position that dominates the account risk.
- Setting a ceiling on combined open risk and staying inside it.
- Understanding what a bad day across the whole book actually costs.
Worked examples
Every figure below is produced by running this calculator against the example inputs, so the numbers always match the tool.
Four open positions on a mid-size account
Total risk across the book at 1% intended per trade.
- Total open risk
- 3.99%
- Loss if every stop is hit
- $2,395
- Largest risk
- DDD
A single oversized position
One position carrying most of the account risk.
- Total open risk
- 7.67%
- Largest risk as a share of the account
- 6.67%
- Equity if every stop is hit
- $55,400
Per-trade risk is not account risk
Position sizing is normally decided one trade at a time, which quietly ignores everything already open. The account does not experience trades one at a time; it experiences them all at once on the days that matter.
Setting a ceiling on combined open risk - and checking it before every new entry - is what turns per-trade discipline into account-level discipline.
Correlation makes the total optimistic
The sum here treats positions as independent. Several trades in the same sector, the same theme or the same direction against one currency are not independent, and in a sharp move they behave like a single much larger position.
No calculator can measure that from prices and stops alone. Where the positions are related, the honest reading of this total is that it is a floor rather than a worst case.
Gaps and slippage
The total assumes every stop fills at its stated price. Overnight gaps, halted instruments, thin markets and fast moves all produce fills worse than the stop, and they tend to happen on the same days across correlated positions.
That is the second reason to treat the figure as a best case, and the reason exposure limits are usually set well below what the arithmetic alone would allow.
Methodology and assumptions
What this calculator does, and what it deliberately does not do.
- Risk per position is the distance between entry and stop multiplied by the quantity you enter.
- Total exposure is entry price multiplied by quantity, summed across positions.
- Everything assumes stops fill exactly at the stated price with no slippage, gaps or fees.
- No correlation between positions is modelled; the total is a simple sum.
- Results are arithmetic on the numbers you enter. Nothing here predicts prices or connects to an exchange, broker or market data feed.
- Nothing you type is transmitted or stored - the calculation runs entirely inside your browser.
This tool is for informational and educational purposes only and does not constitute financial or investment advice. Past performance does not guarantee future results.
Nothing on this website is a recommendation to buy, sell or hold any security, currency, derivative or digital asset. No price is predicted and no return is promised or implied.
Trading and investing carry the risk of substantial loss, including the loss of your entire capital. Leveraged products can produce losses that exceed your deposit. Tax treatment depends on your jurisdiction and your circumstances.
Frequently asked questions
What total open risk is reasonable?
That depends on your strategy, correlation across positions and drawdown tolerance. This site does not suggest a figure - it reports what your current book adds up to.
Does this account for correlated positions?
No, and no simple tool can. Where positions move together, treat the total as an understatement of the real risk.
Should I count positions without a stop?
A position without a stop has undefined risk, which is exactly why it cannot be included. Setting one is the prerequisite for measuring anything.
Is anything I enter stored?
No. The calculation runs entirely in your browser. No position, symbol or price is transmitted anywhere.
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