The currency converter for traders calculates what your foreign-market positions are actually worth in your account currency — accounting for exchange rate moves between entry and exit that generic converters ignore. The core formula is simple: Home P&L = (Foreign Proceeds × Close Rate) − (Foreign Cost × Entry Rate). The calculator above handles all three trader-specific scenarios instantly: P&L reconciliation at close, position sizing in cross-currency accounts, and FX drag quantification on international holds.
How to Use
| Input | What to Enter | Example |
|---|---|---|
| Amount | Foreign-currency value of your position or P&L | £20,000 |
| From Currency | The currency your position is denominated in | GBP |
| To Currency | Your account or reporting currency | USD |
| Entry Rate | Exchange rate when you opened the trade | 1.2700 |
| Close Rate | Exchange rate when you closed the trade | 1.2200 |
The calculator returns your home-currency P&L, the isolated FX drag or boost in dollar terms, and your effective percentage return after the currency impact. For a simple one-way conversion, set Entry Rate and Close Rate to the same value.
Formula Explained
Home P&L = (Foreign Proceeds × Close Rate) − (Foreign Cost × Entry Rate)
FX Drag = Foreign Proceeds × (Close Rate − Entry Rate)
Foreign Proceeds is the amount you received in the foreign currency at exit (shares × exit price, or raw P&L). Foreign Cost is what you paid at entry. Applying different rates to each leg — the entry rate to your cost, the close rate to your proceeds — captures exactly how the exchange rate shift affected your return.
FX Drag isolates the currency component by applying the rate change to your closing proceeds. If GBP/USD dropped from 1.2700 to 1.2200 while you held £22,000 worth of stock, the drag is £22,000 × (1.22 − 1.27) = £22,000 × −0.05 = −$1,100. The stock’s own performance had nothing to do with that loss.
For forex traders, pip value is the practical version of this same calculation. A standard EUR/USD lot (100,000 units) generates $10.00 per pip for a USD account because the quote currency is USD. For a GBP account, divide by GBP/USD: at 1.2500, each pip is worth £8.00. USD/JPY is priced in 0.01 increments, so a standard lot pip ≈ $9.09 at 110.00 — use the pip calculator to verify this across pairs before sizing positions.
Example Calculations
Scenario 1: FX Drag on a FTSE 100 Trade
Sarah holds a $50,000 USD account and buys 500 shares of a FTSE 100 company at £40/share when GBP/USD = 1.2700.
- Entry cost: 500 × £40 = £20,000 × 1.2700 = $25,400
- Six weeks later: stock rises to £44/share (+10% in GBP), but GBP/USD falls to 1.2200
- Sale proceeds: 500 × £44 = £22,000 × 1.2200 = $26,840
- USD profit: $26,840 − $25,400 = $1,440 (5.67%)
- Without FX move (at 1.2700): £22,000 × 1.27 = $27,940 → profit of $2,540 (10%)
- FX drag: £22,000 × (1.22 − 1.27) = −$1,100
A 10% gain in sterling became a 5.67% gain in USD because the 3.9% GBP depreciation erased nearly half the profit. Sarah can use this calculation before entering LSE trades to estimate how much sterling movement would eliminate her expected gain, and whether the FX risk warrants hedging.
Scenario 2: Cross-Currency Position Sizing
A trader with a ₹500,000 INR account wants to trade US-listed equities. With USD/INR at 83.5:
- 1% account risk: ₹500,000 × 0.01 = ₹5,000
- USD equivalent: ₹5,000 ÷ 83.5 = $59.88
Every US position must be sized so that the total loss at the stop does not exceed $59.88. A stock with a $2.00 stop distance allows a maximum of 29 shares ($59.88 ÷ $2.00). Sizing based on the raw rupee amount without converting leads to either undersizing or — more dangerously — dramatically oversizing positions. For traders at Indian brokers, see trading in India for additional considerations.
Scenario 3: Pip Value for a Non-USD Account
A GBP-denominated account trades EUR/USD standard lots. GBP/USD = 1.2500.
- USD pip value: $10.00/pip (standard lot, USD-quoted pair)
- GBP pip value: $10.00 ÷ 1.2500 = £8.00/pip
A 20-pip stop costs £160 per standard lot. Enter that figure into your lot size calculator to determine how many lots to trade given your GBP risk budget.
When to Use This Tool
- Before entering international equity trades — convert your full position cost to home currency to confirm it fits within your portfolio allocation limits.
- At trade close — convert proceeds using the actual close-date rate, not today’s rate. This is the only legally correct rate for IRS Section 988 reporting and most equivalent tax regimes.
- During position review — quantify how much of an open trade’s unrealized P&L comes from price movement versus exchange rate drift.
- For forex pip verification — confirm the pip value in your account currency before placing a position, especially when your account currency is not the quote currency of the pair.
- For crypto withdrawal planning — BTC profits booked in USD-denominated accounts incur a second conversion when moving to EUR or GBP bank accounts. Run both conversion legs to see the total cost before withdrawing.
Related Tools
- Pip Calculator — Calculates pip value in any account currency across major and minor forex pairs; use alongside this tool when sizing forex positions denominated in a non-USD account.
- Stock Profit Calculator — Computes equity trade P&L including commissions; pair with the currency converter to get home-currency net profit on foreign-listed stocks.
- Lot Size Calculator — Determines the correct lot size for a given risk budget; after converting your risk cap to the quote currency here, feed the result into lot size to get final position size.
Frequently Asked Questions
How do I calculate my P&L in USD from a trade on the London Stock Exchange?
Multiply your GBP exit proceeds by the GBP/USD rate on the day you closed the trade. Subtract your entry cost in GBP multiplied by the GBP/USD rate on the day you entered. The difference is your USD P&L. Using today’s rate for a historical trade produces an incorrect number for tax and journaling purposes — always use the rate prevailing on each transaction date.
What is FX drag and how does it affect international stock returns?
FX drag is the portion of return lost because the foreign currency weakened against your home currency during your holding period. Currency fluctuations account for a significant share of total return variance in international equity portfolios. A stock that gains 10% in GBP terms can return under 6% in USD if sterling falls 4% over the same hold — a loss of $1,100 on a £22,000 position with a 5-cent GBP/USD decline.
What exchange rate should I use when reporting forex gains for US taxes?
The IRS requires forex gains and losses to be reported in USD using the spot rate on the actual transaction date (Section 988). Average annual rates or current rates are not compliant. A trading journal that records the prevailing rate at trade close — like JournalPlus does automatically — eliminates the year-end work of reconstructing historical rates from broker statements.
How do I convert pip value to my account currency?
For USD-quoted pairs like EUR/USD, a standard lot pip = $10.00. If your account is in GBP, divide by the current GBP/USD rate: at 1.2500, each pip is worth £8.00 per standard lot, £0.80 per mini lot. For USD/JPY, a standard lot pip ≈ $9.09 at 110.00 because JPY pairs price moves in 0.01 increments. Always recalculate when your account currency rate shifts significantly.
Does currency conversion affect position sizing?
Always calculate your maximum dollar or home-currency risk first, then convert to the foreign currency to determine share count. With a ₹500,000 account at USD/INR 83.5, a 1% risk cap is ₹5,000 — approximately $59.88. If you size based on raw rupees without converting, your actual USD exposure may be far higher or lower than intended. Run the conversion before every cross-currency trade, not just occasionally.
