Position size calculator for funded accounts

A position size calculator tells you how many lots to open so that, if price hits your stop loss, you lose exactly the amount you chose to risk. The formula is simple: lots = risk in USD ÷ (stop in pips × pip value per lot). On a funded account there is one more step: compare that risk with the account’s daily loss limit and drawdown, because those two limits, not the nominal balance, decide whether you keep trading. The calculator below does both at once, with the limits of every EmergeFX account preloaded.

How to use the position size calculator

1. Pick the account: an EmergeFX preset loads its daily loss limit and drawdown; for any other balance, use the manual size.
2. Set your risk per trade as a percentage of the balance or in dollars. On accounts with tight limits, thinking in dollars avoids confusion.
3. Enter your stop in pips: the distance between your entry and the level where the trade idea is invalidated.
4. Choose the instrument. For USD/JPY, enter the current price, because the pip value depends on it. For gold and indices, check that the value per point matches the symbol specification in your platform.
5. Read the four outputs and adjust the risk or the stop until the number of consecutive stops leaves you room for a bad day.

How to calculate lot size from your stop loss: the formula

The right order is stop first, size second. The stop comes from your analysis (a swing low, a swing high, a zone); the size is adjusted so that distance costs exactly what you decided to risk. Moving the stop so a bigger size “fits” is the root mistake behind almost every account blown by overrisking.

Lots = risk in USD ÷ (stop in pips × pip value of 1 lot)

On an account with rules, add two more calculations:

• % of the daily loss limit = actual risk ÷ allowed daily loss.
• Consecutive stops to the limit = daily loss limit (or remaining drawdown) ÷ actual risk, rounded down. If the result is 2, two losing trades put you right at the edge of the day’s limit.

If you need a refresher on what a pip is and how it relates to lot size, we cover it in detail in pips and lots in forex.

Pip value by instrument

On pairs quoted in US dollars (EUR/USD, GBP/USD), the pip value is fixed. On pairs where the dollar is the base currency, such as USD/JPY, it changes with price. For gold and CFD indices there is no universal standard: the value is set by each symbol’s contract size.

Instrument	Stop unit	Value with 1 lot	With 0.10 lots	With 0.01 lots
EUR/USD	Pip (0.0001)	$10	$1	$0.10
GBP/USD	Pip (0.0001)	$10	$1	$0.10
USD/JPY at 150.00	Pip (0.01)	$6.67 (1,000 JPY ÷ 150)	$0.67	$0.07
USD/JPY at 140.00	Pip (0.01)	$7.14	$0.71	$0.07
XAU/USD (100-ounce contract)	$1 of price	$100	$10	$1
CFD indices (US500, US100, US30)	Point	Per symbol specification	Proportional	Proportional

With gold, think in dollars of price rather than pips: a $4 stop (say, from 2,400.00 to 2,396.00) on 1 lot of 100 ounces costs $400. For indices, open the symbol specification in your platform, note the value per point for 1 lot and enter it in the calculator.

Three worked examples on EmergeFX accounts

Example 1: EUR/USD on a 25K Instant Funding account

Daily loss limit $450 and static drawdown $1,500. You decide to risk $100 with a 15-pip stop.

• Lots = 100 ÷ (15 × 10) = 0.666 → 0.66 lots (66,000 units).
• Actual risk = 0.66 × 15 × 10 = $99, 22% of the daily loss limit.
• Consecutive stops: 4 to the daily limit ($396) and 15 to the drawdown ($1,485).

Four stops a day is a reasonable cushion. If your strategy tends to have days with five or six losers, cut the risk to around $70: 0.46 lots ($69 actual) and six stops to the daily limit.

Example 2: USD/JPY on a 50K Classic Instant Funding account

Daily loss limit $1,000 and drawdown $2,500. USD/JPY is trading at 150.00, the stop is 25 pips and the chosen risk is $180.

• Pip value with 1 lot = 1,000 ÷ 150 = $6.67.
• Lots = 180 ÷ (25 × 6.67) = 1.08 lots; actual risk ≈ $180, 18% of the daily loss limit.
• Consecutive stops: 5 to the daily limit ($900) and 13 to the drawdown ($2,340).

Example 3: gold on a 10K Instant Funding account

Daily loss limit $300 and drawdown $800. A $4 stop on the gold price and $50 of risk.

• Cost of the stop with 1 lot of 100 ounces = 4 × 100 = $400.
• Lots = 50 ÷ 400 = 0.125 → 0.12 lots; actual risk $48, 16% of the daily loss limit.
• Consecutive stops: 6 to the daily limit and 16 to the drawdown.

If you widen the stop to $8, the size drops to 0.06 lots to keep the same risk.

EmergeFX accounts: limits and suggested size

The table shows the limits of each EmergeFX Instant Funding account and a suggested risk per trade (the lower of 20% of the daily loss limit and 10% of the drawdown), with the resulting EUR/USD size for a 20-pip stop. It is a prudence benchmark, not an Emerge rule.

EmergeFX Instant Funding	Daily loss limit	Static drawdown	Suggested risk	EUR/USD, 20-pip stop
5K	$150	$400	$30	0.15 lots
10K	$300	$800	$60	0.30 lots
25K	$450	$1,500	$90	0.45 lots
50K Classic	$1,000	$2,500	$200	1.00 lot
50K Flex	$700	$2,300	$140	0.70 lots
100K Classic	$1,850	$3,600	$360	1.80 lots
100K Flex	$1,350	$3,000	$270	1.35 lots
150K	$2,500	$5,000	$500	2.50 lots
250K	$3,000	$7,000	$600	3.00 lots

On the EmergeFX Evaluation, limits are a percentage of the starting balance: for every $10,000, the 1-Step lets you lose $300 in a day and $600 in total; the 2-Step, $500 and $1,000. With the same risk per trade, the 2-Step absorbs almost twice as many consecutive stops.

Common risk calculation mistakes in trading

• Calculating from the balance instead of the drawdown. 1% of a 50,000 account is $500: with a $2,500 drawdown, five stops take you out. The full framework is in risk management best practices.
• Rounding up. 0.666 lots is 0.66, not 0.67. With large sizes, rounding adds several dollars per trade.
• Forgetting spread and commission. Spread, commission and slippage can push the actual loss above the calculated one. Leave a 5% to 10% buffer on the calculated risk, more around news.
• Using the EUR/USD pip value for everything. USD/JPY, gold and indices all have different values.
• Stacking correlated positions. Buying EUR/USD and GBP/USD at the same time with full risk on each is very close to doubling a single trade.
• Jumping size after a winning streak. Besides exposing you to a bad day, it conflicts with Emerge’s Operational Consistency and Position Sizing Rule, which does not allow abrupt changes in position size.

How to enter the result in cTrader and DXtrade

Depending on the platform and its settings, the order ticket may show volume in lots or in units. The conversion is direct: 1 forex lot = 100,000 units, so 0.66 lots is 66,000 units.

1. Open the symbol specification and confirm contract size, minimum volume and volume step (for example, 0.01 lots).
2. Place the stop on the chart and check the pip distance shown on the order; it should match what you entered in the calculator.
3. Enter the calculated volume, with stop and target on the same order, so your protection sits on the server from the start.
4. Check the risk before confirming: if the platform estimates it, or if moving the stop shows an amount that differs from your calculation by more than a few dollars, recheck the pip value or the volume unit.

Step-by-step instructions for each platform are in how to trade on cTrader step by step and how to trade on DXtrade.

Forex lot size calculator and EmergeFX accounts at Emerge Profit

EmergeFX offers simulated trading accounts on forex, indices and commodities, traded on cTrader and DXtrade. Keep in mind that trading involves risk, and a properly calculated size limits losses but does not guarantee results. The right choice depends on how much room you want for mistakes and whether you’re willing to pass an evaluation.

Option	Profit target	Daily / max drawdown	Leverage	Price
1-Step Evaluation	10%	3% / 6% (static)	1:30	From $68
2-Step Evaluation	8% and 5%	5% / 10% (static)	1:100	From $68
EmergeFX Instant Funding	No evaluation	Fixed amounts per account (table above), static	1:100 equivalent	From $120

• If you want the most room for the size you calculated: the EmergeFX 2-Step Evaluation, with 5 minimum trading days, no time limit, an 80% to 90% profit split once you pass and a 125% refund of the challenge fee with your first reward. Static drawdown and weekend holding allowed.
• If you prefer a single target: the 1-Step, with a 100% fee refund, but tighter limits: use lower risk.
• If you don’t want an evaluation: EmergeFX Instant Funding, with swing trading and news trading allowed and a 50% consistency rule.

Before you choose, you can estimate your odds of passing with the prop firm challenge simulator. If you trade futures, use the futures contract calculator.

Position size calculator FAQ

Sources

• Babypips – What’s a pip? (pip value formula) (accessed November 2026).
• CMC Markets – Forex lot sizes (accessed November 2026).
• cTrader Help Centre – Trading glossary: lot, pip, volume and units (accessed November 2026).
• Axi – Gold trading guide (100 ounces per lot) (accessed November 2026).
• Axi – Nasdaq 100 futures CFD (value per point per specification) (accessed November 2026).
• Emerge Profit – EmergeFX account selector (limits for each account, accessed November 2026).

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