A currency, two prices.

Mid-market is the real rate. Bank rate is mid-market plus spread. Spread is how foreign-exchange businesses make money.

At mid-market
€915
1 USD = 0.915 EUR

Real cost comparison

ProviderSpreadYou receive
Mid-market (real rate)0%€915
Wise / Revolut~0.4%€911
Major bank~3%€888
Airport kiosk~8–12%€833
The hidden fee

Spread, not commission.

Banks rarely charge an explicit FX commission. They make their margin in the rate they quote — typically 2-4% off mid-market for retail wires, 0.3-0.7% for fintech (Wise, Revolut), and 8-12% for airport kiosks. On a $5,000 USD-to-EUR wire at 3% spread, you lose ~$150 invisibly. The number to compare is "euros received," not "fee charged" — most banks advertise no-fee or low-fee transfers while quietly burying a 3% spread that costs more than any explicit fee would.

Effective rate = mid-market × (1 − spread)
Effective fee = (mid-market − quoted rate) ÷ mid-market
  • Mid-market — interbank rate, what Google/XE/Wise show
  • Quoted rate — what your provider gives you
  • Spread — typically 0.4% (Wise) to 12% (airport)
Worked example

$5,000 USD to euros, four ways.

Scenario · Mid-market rate 1 USD = 0.915 EUR (illustrative)
Mid-market reference. $5,000 × 0.915 = €4,575. The number you'd get with zero spread.
Wise / Revolut (~0.4% spread). €4,557. Cost: €18.
Major US bank (~3% spread, plus $35 wire fee). €4,438 minus the $35 wire = ~€4,406. Cost: €169.
Airport kiosk (~10% spread). €4,118. Cost: €457.
Same $5,000. Choosing Wise over an airport kiosk is a €440 difference — almost a tenth of the entire transfer. Provider choice dominates rate timing.
Provider comparison

Where to actually convert money.

Provider typeTypical spreadBest for
Wise / Revolut / OFX0.3–0.7%Most retail transfers under $50k
No-foreign-fee credit card (Chase Sapphire, Cap One Venture)~0% spread, 0% FTFForeign purchases — always pay in local currency
Schwab / Fidelity debit (no FTF)~1% Visa/MC networkInternational ATM withdrawals
Standard credit card with FTF1–3% FTF + ~0% spreadConvenience only — not optimal
Major bank wire2–4% + $25-50 wireAvoid for retail amounts
Western Union / MoneyGram5–10% all-inCash pickup in remote areas only
Airport / hotel kiosk8–12%Last resort, small amounts only
Forward contract (OFX, Wise Business)~0.5% + small premiumLocking large future obligations
Common mistakes

Where FX fees stack invisibly.

Always pay in local currency abroad

"Would you like to pay in USD?" at a foreign terminal is Dynamic Currency Conversion (DCC) — a 4-8% spread layered on top of any card fee. Always say no. The card network (Visa/Mastercard) gives you near-mid-market; the merchant's DCC service does not. Same applies at foreign ATMs ("withdraw in USD?" — say no).

Don't compare "no fee" claims at face value

Most "no FX fee" providers bury the cost in the rate. Bank of America's "no commission" might quote 1.04 EUR/USD when mid-market is 1.07 — a 2.8% effective spread, $280 on a $10,000 transfer. Compute the euros received vs mid-market to see the real cost. Wise displays the spread explicitly.

Don't FX-convert money you don't need to convert

If you have recurring receipts in EUR and recurring expenses in USD (or vice versa), holding a multi-currency account (Wise Multi-Currency, Revolut, HSBC Global Money) lets you avoid round-trip conversion. A US freelancer paid in EUR can hold euros, pay euro expenses, and convert only the net surplus to USD — vs converting every payment immediately and converting back for euro spending.

Methodology

What's behind the comparison.

Assumptions
  • Calculator uses fixed illustrative rates for educational comparison — NOT live market rates. Check Wise, XE, or Google for current rates before transacting.
  • Spreads modeled: 0% (mid-market reference), 0.4% (Wise/Revolut), 3% (major bank), 8-12% (airport kiosk).
  • Excludes wire fees ($25-50 typical for international bank wires) and fixed transfer fees (Wise charges ~$1-3 plus the percentage).
  • Currency code list limited to majors (USD, EUR, GBP, JPY, CAD, AUD, CHF). Emerging-market currencies typically have wider spreads.
  • Cross-rates derived from each currency's USD rate, not directly quoted.
  • Card network rates (Visa/Mastercard) typically near mid-market, varying ~0.5-1% by network and currency pair.

Sources: Wise public spread disclosures (Wise.com transparent pricing); Revolut FX rate methodology; OECD/BIS triennial central bank survey on FX market structure; CFPB consumer guidance on international wire fees; Visa/Mastercard published interchange and FX network rates; The Economist Big Mac Index for purchasing power parity context.

Glossary

FX vocabulary.

Mid-market rate
The interbank midpoint between bid and ask. The "real" rate.
Spread
Difference between provider's quoted rate and mid-market. The hidden fee.
Bid / Ask
The price someone will buy at / sell at. Mid is the average.
FTF
Foreign Transaction Fee — explicit card surcharge on foreign purchases.
DCC
Dynamic Currency Conversion — terminal-side spread trap. Always decline.
Forward
Contract to lock an exchange rate today for a future settlement.
Spot rate
Current exchange rate for immediate settlement (typically T+2).
PPP
Purchasing Power Parity — theoretical rate equalizing baskets of goods.
Related

Tools that pair with this one.

FAQ

Questions, asked plainly.

The midpoint between bid and ask in the global wholesale FX market — the rate banks use with each other and what Google, XE, and Wise display. No consumer transacts at exactly this rate; every retail provider adds a spread. Major pairs (USD/EUR, USD/GBP, USD/JPY) trade 24/5 across overlapping global sessions.

Difference between quoted rate and mid-market: 2-4% retail bank wires, 0.3-0.7% fintech (Wise/Revolut), 0.5-1.5% credit-card foreign purchases, 8-12% airport kiosks. Banks rarely charge explicit FX commission — the markup IS the fee. $5,000 wire at 3% = $150 invisible cost. Compute euros received, not "fee charged."

Almost always, yes. Wise: ~0.4-0.7% upfront fee, mid-market rate. $10k transfer ≈ $40-70 fees, ~$9,930 worth delivered. Same via major US bank: $25-50 wire + 2-4% spread = $250-450 total. Savings grow with bigger amounts. Revolut, OFX, Remitly similarly transparent. Exception: small amounts <$200 where flat fee dominates.

Depends on card. No-foreign-transaction-fee cards (Chase Sapphire, Cap One Venture, Schwab Debit, Wise card) charge 0% on foreign purchases at mid-market or near. Standard cards charge 1-3% FTF. Always pay in local currency, not USD — Dynamic Currency Conversion (DCC) at the terminal adds 4-8% spread. "Pay in dollars?" prompt is a fee trap.

Three layers: (1) your bank's foreign ATM fee ($3-5 — Schwab Investor Checking refunds globally); (2) ATM operator surcharge ($2-7); (3) network FX spread (1-3% Visa/MC). Withdraw larger amounts less frequently to amortize fixed fees. Avoid airport ATMs (often Travelex/Euronet at 8-15% spread). Best: Schwab Investor, Fidelity Cash Mgmt, Wise debit, Revolut Premium.

Locks an exchange rate today for a future date — typically 1, 3, 6, or 12 months. Useful for international property purchases, large foreign-currency invoices, expat employment, planned tuition. Wise Business and OFX offer retail forwards. Cost: small premium above spot (interest-rate differential). For under $50k with flexible timing, spot via Wise is usually cheaper.

Continuously. Drivers: interest rate differentials (carry trade), inflation differentials, trade balances, capital flows, central bank policy, geopolitical risk (safe-haven flows to USD/CHF/JPY), economic data. Major pairs trade trillions/day globally. For practical consumer purposes: the rate at the moment you confirm is the rate, regardless of why.

For small amounts, no — savings from "better timing" usually less than waiting cost. For $25k+: monitor 1-2 weeks, transfer in upper third of range. Don't wait months — currencies trend on macro factors retail can't predict. For $100k+ with flexibility, split into 2-3 tranches over weeks. For known future obligations, a forward eliminates the risk at a small premium.

Theoretical exchange rate at which a basket of goods costs the same in two currencies. The Economist's "Big Mac Index" is a famous measure. PPP rates can differ from market rates by 30-50% over multi-year periods. PPP matters for travel-affordability comparisons and international economic comparisons (real GDP), not for your next vacation transfer.

For most retail under $50k: Wise, Revolut, or OFX. Total ~0.4-0.7% all-in. Under $1k to specific corridors (US-Mexico, Philippines, India), Remitly/Xoom often beat on speed via mobile-wallet. Large recurring business ($10k+/month): brokers (Cambridge, OANDA, AFEX) for custom rates. Avoid: bank wires, Western Union (5-10%), MoneyGram, airport kiosks.