FX Fee Calculator: What Currency Conversion Really Costs
When you buy a US or overseas share from a GBP account, your broker converts your pounds — and most take a currency-conversion (FX) fee for doing so. This free calculator shows exactly what that fee costs in pounds for the amount you convert, ranked cheapest first, using each broker's published FX rate verified June 2026. The gap between 0.15% and 0.99% sounds trivial until you see it in cash.
Reviewed by Yaniv Barshaf · Fees verified June 2026 · Our methodology
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Currency conversion fee calculator
Buying a US or overseas share from a GBP account means converting currency — and most brokers take a cut. Enter the amount you convert to see each broker's FX fee in pounds, per trade and per year.
Cheapest FX fee on £1,000.00
Robinhood — £0.00 per conversion (0%)
Over 12 trades a year that's £118.80 less than Freetrade.
| Broker | FX fee | Cost on £1,000.00 | Annual cost (12 trades) |
|---|---|---|---|
| CheapestRobinhood | 0% (no FX fee) | £0.00 | £0.00 |
| InvestEngine | 0% (no FX fee) | £0.00 | £0.00 |
| Trade Republic | 0% (no FX fee) | £0.00 | £0.00 |
| Scalable Capital | 0% (no FX fee) | £0.00 | £0.00 |
| Lightyear | 0.1% | £1.00 | £12.00 |
| Trading 212 | 0.15% | £1.50 | £18.00 |
| DEGIRO | 0.25% | £2.50 | £30.00 |
| Webull | 0.35% | £3.50 | £42.00 |
| XTB | 0.5% | £5.00 | £60.00 |
| Revolut | 0.5% | £5.00 | £60.00 |
| eToro | 0.75% | £7.50 | £90.00 |
| Freetrade | 0.99% | £9.90 | £118.80 |
FX rates are each broker's published currency-conversion fee (verified June 2026), applied to the amount you enter. A 0% fee means the broker adds no conversion markup — with InvestEngine, for example, all ETFs are GBP-denominated, so no conversion is needed. Robinhood shows 0% because it trades USD-denominated assets for its US clients. Most brokers also apply the fee again when you sell and convert back. Share-dealing (stock/ETF) brokers only; CFD and spread-based brokers are excluded because their currency costs are priced through spreads, not a comparable per-conversion fee. Capital at risk. This is not financial advice. Investing involves risk of loss.
How the FX fee calculation works
Enter the amount you convert per trade (say £1,000) and how many currency-converting trades you make in a year. For each share-dealing broker, the calculator multiplies your amount by that broker's published FX fee — Trading 212's 0.15%, XTB's 0.5%, eToro's 0.75%, Freetrade's 0.99%, and so on — to show the cost per conversion, then multiplies by your trade count for the annual figure. Brokers with a genuine 0% FX cost are included and flagged: InvestEngine holds only GBP-denominated ETFs, so no conversion happens, and Robinhood trades USD assets for its US clients. Remember most brokers charge the fee again when you sell and convert back, so a full round trip roughly doubles the numbers shown. CFD and spread-based brokers are excluded because they price currency through spreads, not a comparable per-conversion fee. Figures verified June 2026. Capital at risk.
Why FX fees matter more than they look
FX is the fee most investors underestimate, because it is a percentage of the whole trade rather than a headline commission. On a £1,000 US-share purchase, 0.15% is £1.50 while 0.99% is £9.90 — and that is one direction only. An investor who converts £1,000 twelve times a year pays about £18 with Trading 212 versus roughly £119 with Freetrade, before counting the sell-side conversion. Over years of regular investing into US and global markets, choosing a low-FX platform can save hundreds of pounds with no change to what you actually buy. If you invest only in GBP-denominated funds, a 0% FX platform like InvestEngine removes the cost entirely. Use this alongside the full trading cost calculator, which layers commission and withdrawal fees on top of FX.
Frequently Asked Questions
What is an FX or currency-conversion fee?
It is the charge a broker adds when it converts your account currency (e.g. GBP) into the currency of the asset you are buying (e.g. USD for a US share). It is usually a percentage of the trade value — commonly 0.15% to 1% — and most brokers apply it again when you sell and convert back.
Which broker has the lowest FX fee?
Among the share-dealing platforms in this tool, Trading 212's 0.15% is the lowest headline FX fee, and InvestEngine effectively charges 0% because its ETFs are GBP-denominated so no conversion is needed. The calculator ranks every eligible broker cheapest first for the amount you enter.
How can a broker charge 0% FX fee?
Two ways. A platform like InvestEngine offers only GBP-priced ETFs, so your pounds are never converted. And a US broker like Robinhood trades USD-denominated assets for USD-based clients, so there is no cross-currency step. If you buy a foreign-currency asset elsewhere, an FX fee almost always applies.
Does the calculator include the sell-side conversion?
No — it shows the cost of converting in the amount you enter, per trade and per year. Most brokers charge the same FX fee again when you sell and convert the proceeds back to GBP, so a complete buy-and-sell round trip costs roughly double the figure shown.
Are these FX rates guaranteed?
They are each broker's published currency-conversion fee, verified June 2026, and they can change. Some brokers also offer lower FX on premium plans. Treat the ranking as a like-for-like comparison and confirm the current rate on the broker's own fee page before you trade.