Lot Size Calculator — Forex, Metals, Indices & Crypto

Position sizing for all instruments in your account currency. R:R scenarios, losing streak simulator, live ECB rates. No sign-up required.

Position Sizing & Streak Simulator
Instrument & Account
R
Risk Parameters
%
pips
R:R Scenarios
trades
Recommended Lot Size
—
—
Price levels
Add your entry price above and the stop-loss and target levels appear here.
Amount at risk
—
Per-pip value
—
% of balance
—
Spread cost
—
R:R Scenarios at this position
R:RTarget pipsIf winWin rate needed
Losing streak simulation — 10 trades
#LotsLostBalance after
16
instruments, each with its own sizing page
10
account currencies, converted live
3
risk views: R:R, losing streak, spread cost
ECB
reference rates, refreshed each business day
Position sizing, shown

Same risk, different stop, different lot size

A $100 risk on a $10,000 account is 1% whatever you trade. What changes is how many lots that buys: a tight stop buys many, a wide stop buys few. Drag the stop and watch the two numbers move in opposite directions while the money at risk stays still.

10 pips100200 pips
Money at risk
$100.00
fixed — 1% of $10,000
Stop distance
40 pips
you choose this
Lot size that fits
0.25
$2.50 per pip
$100.00 ÷ (40 pips × $10.00 per pip per lot) = 0.25 lots
1.00
10
0.50
20
0.25
40
0.17
60
0.10
100
0.07
150
0.05
200
bar height = lot size ↑ stop-loss distance in pips →
Stop-lossLot sizePer pipIf stopped out
10 pips 1.00 $10.00 −$100.00
20 pips 0.50 $5.00 −$100.00
40 pips 0.25 $2.50 −$100.00
60 pips 0.17 $1.67 −$100.00
100 pips 0.10 $1.00 −$100.00
150 pips 0.07 $0.67 −$100.00
200 pips 0.05 $0.50 −$100.00

The last column is the point: every row loses the same 1% if the stop is hit. That is what position sizing buys you — one decision about risk instead of a new one per trade.

Every instrument, with the numbers sizing depends on

The last column answers the question people actually arrive with: with $100 at risk and a 50-pip stop, how many lots is that? Pip values quoted in another currency move with the market and are converted at the live rate — those rows carry a dot.

Instrument Class Pip size Contract / lot Pip value / lot Lots for $100 @ 50 pips
EUR/USD Major 0.0001 100,000 $10.00 0.20
GBP/USD Major 0.0001 100,000 $10.00 0.20
AUD/USD Major 0.0001 100,000 $10.00 0.20
NZD/USD Major 0.0001 100,000 $10.00 0.20
USD/JPY Major 0.01 100,000 — —
USD/CHF Major 0.0001 100,000 — —
USD/CAD Major 0.0001 100,000 — —
EUR/GBP Cross 0.0001 100,000 — —
EUR/JPY Cross 0.01 100,000 — —
GBP/JPY Cross 0.01 100,000 — —
AUD/JPY Cross 0.01 100,000 — —
XAU/USD Gold 0.01 100 oz $1.00 2.00
XAG/USD Silver 0.01 5,000 oz $50.00 0.04
NAS100 Index 1 pt 10 units $1.00 2.00
US30 Index 1 pt 10 units $1.00 2.00
BTC/USD Crypto 1 1 BTC $1.00 2.00

Index and crypto point values are the broker's own contract terms rather than a market convention — check them in your platform before sizing a position. Everything else here is fixed by the instrument.

Account currency flexibility

FxPro supports 15+ account currencies including USD, EUR, GBP, JPY and more. Trading in your local currency eliminates conversion fees on deposit and withdrawal — typically 1–3% at your bank on every transfer. On a $5,000 account that's $50–$150 saved on one round trip.

FCA · CySEC · FSCA · SCB — four independent regulators covering the UK, EU, South Africa and the Bahamas. Client funds are segregated from company funds.

RegulatorJurisdiction
FCAGB
CySECCY · EU
FSCAZA
SCBBS
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How to use this calculator

01

Select your instrument

Choose from forex pairs (majors and crosses), metals (XAU/USD gold, XAG/USD silver), indices (NAS100, US30) or crypto (BTC/USD). The calculator uses the correct pip size and contract specifications for each instrument class.
02

Set account balance and risk %

Your balance is the full account equity. Risk % is the portion you plan to lose if stopped out. Most professionals use 1%. The calculator converts this to an exact currency amount at risk, then works backwards to the lot size.
03

Enter your stop-loss distance

The distance in pips (or points for indices) from your entry to your stop-loss level. The calculator divides your risk amount by the pip value to find the correct lot size. Wider stop = smaller position.
04

Review R:R scenarios and streak simulation

The R:R table shows how much you make at 1:1, 1:1.5, 1:2 and 1:3 risk-reward with this position size. The streak simulation stress-tests your account across consecutive losses — the most important risk management check.

Frequently asked questions

What is position sizing?

Position sizing is determining how many lots to trade so a losing trade costs exactly the amount you planned. Correct sizing makes risk consistent regardless of which pair you trade or where your stop-loss is.

How does the lot size formula work?

Lots = (Account Balance × Risk%) ÷ (Stop-Loss pips × Pip Value per lot). For EUR/USD with a USD account, pip value is fixed at $10/lot, making the calculation straightforward. For other pairs, the pip value depends on the current exchange rate — the calculator fetches this live from ECB.

How does this work for gold (XAU/USD)?

Gold uses 100 troy ounces per standard lot, pip size $0.01. Pip value = $1.00 per standard lot (fixed). For a $100 risk with a 50-pip stop: lots = $100 ÷ (50 × $1.00) = 2.00 lots. Always verify gold contract specs with your broker.

Why does lot size change on each losing trade in the simulator?

The simulator uses proportional risk — each trade risks the same percentage of the current balance, not the same fixed amount. As balance falls after losses, the amount at risk falls proportionally and lot sizes shrink. This is how professional traders prevent a losing streak from becoming catastrophic.

What does 'spread cost' mean?

The spread cost is the cost of entering the trade from your lot size: spread pips × pip value per lot. This is money paid to the broker on entry, before price has moved. It must be overcome before the trade is profitable.

What is the break-even win rate in the R:R table?

The minimum percentage of trades you need to win to be profitable at that R:R ratio. At 1:2 R:R, you only need to win 33% of trades to break even. At 1:3 R:R, just 25%. This is why R:R matters more than win rate alone.
The toolkit

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