Formula Used
Risk amount equals account balance multiplied by risk percent. If fixed risk is selected,
the calculator uses the fixed amount instead.
Stop distance equals the absolute difference between entry price and stop loss price.
Risk per unit equals stop distance plus slippage, multiplied by point value, plus commission.
Position units equal planned risk amount divided by risk per unit. Lots equal units divided
by units per lot. The final lot size is rounded down by lot step to help avoid oversizing.
Exposure equals adjusted units multiplied by entry price, point value, and currency rate.
Margin equals exposure divided by leverage. Reward to risk equals potential reward divided
by adjusted risk.
How To Use This Calculator
Enter your account balance first. Choose whether risk should use a percentage or a fixed
amount. Add entry, stop, and target prices. Select long or short direction. Keep point
value at one for simple shares or crypto units. Change it when each price point has a
different cash value.
Use units per lot, lot step, and minimum lot to match your market. Add fees and slippage
for a stricter result. Press the calculate button. The result appears above the form.
You can then download the calculation as CSV or PDF.
Example Data Table
| Account |
Risk |
Entry |
Stop |
Target |
Point Value |
Suggested Meaning |
| 10,000 |
1% |
50 |
48 |
56 |
1 |
Simple equity style setup |
| 25,000 |
0.75% |
4100 |
4085 |
4145 |
5 |
Contract based setup |
| 5,000 |
2% |
1.2500 |
1.2450 |
1.2650 |
100000 |
Lot based currency example |
Trade Position Size Calculator Guide
A trade plan starts with risk. Position size turns that risk into a clear number of units
or lots. This calculator uses account value, allowed loss, entry price, stop price, fees,
slippage, and leverage. It helps you compare the trade before you place an order.
Why Position Size Matters
Many traders focus on direction first. Size can be more important. A strong idea can still
damage an account when the stop is wide and the position is too large. A smaller idea can
be acceptable when risk is limited. The calculator links the money at risk to the distance
between entry and stop. This keeps every setup consistent.
Reading The Results
The result shows risk amount, risk per unit, adjusted units, adjusted lots, exposure,
margin estimate, potential reward, and reward to risk ratio. The adjusted lot value rounds
down to the selected lot step. This prevents accidental oversizing. If the stop distance is
very small, the tool warns you because small stops can create oversized trades.
Using Advanced Inputs
Use contract multiplier when one unit represents more than one price unit. Futures and some
derivatives often need this. Use units per lot for markets that trade in lots. Set it to one
for shares or simple crypto units. Add round trip commission and expected slippage when you
want a more conservative size. Use the currency rate when the quote currency differs from
your account currency.
Risk Control Ideas
Many traders risk a small percentage per trade. The right value depends on strategy,
volatility, and experience. The calculator is not a prediction tool. It only measures
position size from the inputs supplied. You still need a valid plan, clear stop logic, and
market awareness. Always review broker rules, minimum lot size, spreads, and margin
requirements.
Practical Example
Assume an account is 10,000 and risk is 1%. The entry is 50. The stop is 48. The planned
loss is 100. With no fees, each unit risks 2. The suggested size is 50 units. If the target
is 56, potential reward is 300, and the reward to risk ratio is 3 to 1.
Save results and compare setups in a log. Good records improve decisions over time.
FAQs
1. What is position size?
Position size is the number of units, shares, contracts, or lots used in a trade. It connects your planned loss to the distance between entry and stop.
2. Why does stop distance matter?
A wider stop increases risk per unit. That usually lowers the position size. A smaller stop lowers risk per unit but may create an unrealistic oversized trade.
3. What is risk percent?
Risk percent is the share of account balance you are willing to lose if the stop is hit. Many traders keep this value small and consistent.
4. What should I enter for point value?
Use one when each price move equals one money unit per unit traded. Use a contract multiplier when your market assigns a different cash value to each point.
5. What does units per lot mean?
Units per lot tells the calculator how many units are inside one lot. Use one for simple unit trading. Use your broker lot size for lot based markets.
6. Why is the lot rounded down?
The calculator rounds down by lot step to reduce accidental oversizing. This keeps the adjusted risk at or below the planned risk in most normal cases.
7. Does leverage change position risk?
Leverage changes estimated margin, not the stop based risk itself. A leveraged trade can still lose the full stop based amount if price reaches the stop.
8. Is this calculator financial advice?
No. It is only a planning tool. Always check broker rules, spreads, commissions, margin terms, and your own strategy before placing any live order.