How to Use
- 1.
Enter account balance, account currency, and the percentage you plan to risk.
- 2.
Choose a currency pair or XAU/USD, then enter the stop-loss distance in pips or points.
- 3.
Update reference exchange rates or enter the broker pair price and quote-to-account conversion manually.
- 4.
Confirm leverage, pip size, and contract size against the broker's instrument specification.
- 5.
Review lots, units, risk amount, pip value, margin, and reward targets.
- 6.
Optionally add existing position risks, copy or download the result, and save a local journal entry.
Features
Risk-based forex lot size calculation
Standard, mini, and micro lot context
EUR/USD, GBP/JPY, XAU/USD, and other presets
USD, PKR, EUR, GBP, JPY, CAD, and AUD account currencies
Editable pip and point size
Adjustable broker contract size
Reference exchange-rate lookup with manual fallback
Risk amount in account currency and percent
Automatic pip-value estimate
Approximate leverage and margin calculation
Notional exposure display
Three editable risk-reward targets
Combined open-position risk
High-risk percentage warnings
Local browser trade journal
Copy, download, and print actions
Responsive mobile layout
CFTC-linked risk disclosure
Frequently Asked Questions
How is forex lot size calculated?+
Risk amount is account balance multiplied by risk percent. Position units equal risk amount divided by stop-loss pips multiplied by pip value per unit in the account currency. Units are then divided by the contract size to produce lots.
What is a standard, mini, and micro lot?+
A common forex standard lot is 100,000 base units, a mini lot is 10,000, and a micro lot is 1,000. Broker notation commonly shows these as 1.00, 0.10, and 0.01 lots, but contract specifications can differ.
How does the calculator find pip value?+
It multiplies position units by the pair's pip size, then converts the quote-currency value into the selected account currency. Verify pip size and conversion rates with the broker.
Does leverage change the lot size based on risk?+
Not in this risk formula. Risk and stop distance determine position size. Leverage changes estimated margin availability and exposure, not the amount lost if the stop executes exactly as assumed.
Can I calculate XAU/USD gold lot size?+
Yes. Select XAU/USD and enter the broker's current price, point size, and units per lot. Gold contract and tick conventions can vary significantly by broker.
Are the exchange rates real time?+
The Update Rates button retrieves cached reference currency rates when available. They are not guaranteed real-time executable broker prices. Manual inputs remain available and should be checked against current broker quotes.
What happens if my account currency is PKR?+
Select PKR and provide or fetch the number of PKR per pair quote-currency unit. The calculator converts pip value, risk, notional exposure, and margin into PKR.
What risk percentage should I use?+
The tool does not recommend a risk percentage. It highlights entries above 2% as high risk, but no percentage makes leveraged trading safe or suitable for a person.
Is required margin exact?+
No. It is an estimate based on notional exposure and entered leverage. Brokers may use instrument tiers, regulatory caps, spreads, hedging rules, volatility adjustments, and different conversion prices.
Can stop-loss slippage increase my loss?+
Yes. Gaps, volatility, liquidity, spreads, and execution can fill a stop at a worse price than entered, so actual loss can exceed the planned risk amount.
Where is the trade journal saved?+
It is stored only in local browser storage on the current device. It is not uploaded or synchronized, and it can disappear when browser data is cleared.
Is this calculator financial advice?+
No. It is an educational arithmetic tool, not investment advice, a trade recommendation, broker pricing, or a promise of execution or returns.
About this tool
Free Forex Lot Size Calculator
Use this Forex Lot Size Calculator to estimate a position from account balance, percentage risk, stop-loss distance, currency pair, account currency, and broker contract size. The result includes lot size, base units, risk amount, pip value, approximate margin, notional exposure, take-profit targets, and combined risk from other open positions.
How the Forex Lot Size Calculator Works
The calculator first multiplies account balance by risk percentage to find the planned currency loss if the stop is reached. It then converts one pip or point into the account currency and divides the risk amount by stop distance multiplied by pip value per unit. The resulting units are divided by the selected contract size to produce lots.
Risk Percentage and Stop-Loss Distance
Risk percentage controls how much account equity is allocated to the trade idea. Stop-loss distance controls how much price movement the position must tolerate. A wider stop requires a smaller position when currency risk stays constant; a tighter stop produces a larger calculated position. This mathematical relationship does not mean a tight stop is better, because spreads, volatility, slippage, and market gaps can cause different execution.
Pip Value for Currency Pairs and Gold
For most non-JPY forex pairs, one pip is commonly 0.0001 of the quoted price. JPY pairs commonly use 0.01. XAU/USD broker specifications vary, so the tool provides editable point size, contract size, and price. Always match these settings with the instrument specification shown by the broker rather than assuming every provider uses identical conventions.
Standard, Mini, and Micro Lot Sizes
A common forex standard lot represents 100,000 base-currency units, a mini lot 10,000, and a micro lot 1,000. In decimal broker notation, these are often 1.00, 0.10, and 0.01 lots. Some brokers support smaller steps, while metals, indices, crypto CFDs, and other contracts may use different unit sizes.
Account Currency and Exchange-Rate Conversion
When the pair's quote currency differs from the account currency, pip value must be converted. The Update Rates button requests a cached reference conversion, while every rate remains editable for a broker quote or manual fallback. Reference currency rates are not executable prices and can differ from live bid, ask, spread, markup, and market movement.
Leverage and Required Margin
Approximate margin equals notional account-currency exposure divided by leverage. Leverage affects how much margin may be required but does not reduce the planned stop-loss risk. It magnifies exposure and can accelerate losses. Broker margin schedules, regulatory limits, hedging rules, instrument tiers, weekends, and volatility adjustments may produce a different requirement.
Risk Reward and Multiple Take-Profit Levels
The three editable reward ratios translate risk amount and stop distance into example reward targets. A 1:2 target displays twice the planned risk amount and twice the stop distance. It is an arithmetic planning reference, not a forecast of profit or probability of success.
Combined Risk Across Open Positions
Separate positions can be correlated and may lose together. Add the planned account-currency risk from existing positions to see combined exposure alongside the new trade. This is a simple sum and cannot model correlation, gaps, stop slippage, changing volatility, or positions without a reliable exit.
Local Trade Journal and Privacy
The save button stores up to twenty calculation summaries in browser local storage. Journal data is not uploaded or synchronized with an account. Clearing browser storage or using another device removes access to those local records.
Using the Result Responsibly
Retail forex trading is highly risky. The CFTC warns that leverage amplifies gains and losses, margin can be lost quickly, and customers may face losses beyond their initial deposit depending on the arrangement. Confirm every value with a regulated broker and never treat a calculator result as investment advice, a recommendation, or proof that a trade is affordable.
To compare the calculated exposure with broader financial capacity, review assets and debts in the Net Worth Calculator. For a simple return calculation on a completed investment, use the ROI Calculator. Neither related tool evaluates whether leveraged forex trading is suitable or safe.