Finance calculator

Free currency converter calculator

Convert between currencies at the current exchange rate — enter an amount and rate to see the converted value and the effective cost of bank spreads, updated live, as you type.

InputsLive
Principal
$
Annual interest rate
%
Time period
yrs
Result
Interest earned
$750
Total: $5,750 · I = P × r × t
Interest$750
Total$5,750
Principal$5,000
Rate × years15%

Simple interest only — does not compound. I = P × r × t.

Results are estimates. Consult a professional.

How it's calculated

How the currency converter works

A currency converter multiplies your base amount by the exchange rate between the two currencies. The rate quoted by financial data providers is the mid-market rate — the midpoint between what dealers will buy and sell a currency for. Banks and money transfer services add a spread on top, so you receive less than the mid-market rate implies.

Converted Amount = Base Amount × Exchange Rate
Effective Rate (after spread) = Mid-Market Rate × (1 Spread%)
Amount Received = Base Amount × Effective Rate
Spread Cost = Base Amount × (Mid-Market Rate Effective Rate)
CFPB — International money transfers: understanding the cost
Example

Worked example: $1,000 USD to euros with bank spread

Example: $1,000 USD → EUR at mid-market rate 0.92 with a 2% bank spread

Sarah is wiring $1,000 USD to a vendor in Germany. The mid-market EUR/USD rate today is 0.92 (meaning 1 USD buys €0.92). Her bank charges a 2% spread. How many euros does the vendor actually receive?

Mid-market conversion: $1,000 × 0.92 = €920.00
Effective rate after 2% spread: 0.92 × (1 0.02) = 0.92 × 0.98 = 0.9016
Amount received: $1,000 × 0.9016 = €901.60
Spread cost: €920.00 €901.60 = €18.40 (≈ $20.00)
€901.60 received
At mid-market the vendor would receive €920, but the bank's 2% spread reduces it to €901.60 — a hidden cost of $20 on a $1,000 transfer.
Quick reference

Mid-market rates vs. typical spreads by channel

Exchange rates change by the second, but the spread charged by the conversion channel is what you can control. The figures below show typical spreads — always compare before transferring large amounts.

Currency PairTypical Bank SpreadCard/ATM SpreadSpecialist Service
USD / EUR1.5–3%1–2%0.3–0.5%
USD / GBP1.5–3%1–2%0.3–0.5%
USD / JPY1.5–3%1–2.5%0.3–0.6%
USD / CAD1–2.5%0.5–1.5%0.2–0.4%
USD / AUD1.5–3%1–2%0.3–0.5%
USD / MXN2–4%1.5–3%0.5–1%

Spreads are approximate and vary by provider, amount, and account type. Specialist services include Wise, Revolut, and similar remittance platforms. Source: CFPB remittance guidance; published provider rate sheets.

Practical tips

Tips for getting the best exchange rate

The exchange rate you see on Google or XE.com is the mid-market rate that banks themselves trade at. What you receive is always less. These five steps help you close that gap.

  • Compare the all-in cost, not the rate alone — Some services advertise a rate close to mid-market but charge a flat fee on top; others build everything into the spread. Always calculate total euros (or yen) received to compare apples to apples.
  • Avoid airport and hotel exchange kiosks — These typically charge spreads of 5–10%, the worst rates available. Withdraw local currency from an ATM inside your destination airport instead, or pay by card using a no-foreign-transaction-fee card.
  • Lock in rates for large transfers — Many specialist services (Wise, OFX, Currencies Direct) let you lock a rate for 24–72 hours or even forward-contract months ahead. Useful when you know you will need euros for a property purchase.
  • Avoid 'dynamic currency conversion' at point of sale — When a foreign ATM or retailer asks whether you want to pay in your home currency, always choose the local currency. The offered rate typically includes a 3–6% spread applied by the merchant's bank.
  • Use specialist services for amounts over $1,000 — For transfers above $1,000, a specialist money-transfer platform will typically save 1–3% versus a retail bank — hundreds of dollars on a $10,000 wire.
Accuracy & limits

Accuracy and limitations

Exchange rates fluctuate continuously during market hours and the mid-market rate displayed by this calculator may not match the rate your bank or transfer service applies at the exact moment of your transaction. Rates shown are indicative only. Transfer fees, correspondent bank fees, and recipient bank charges may further reduce the amount delivered. Always confirm the total cost and delivered amount with your transfer provider before executing.

Not financial advice — consult a financial professional for your specific situation.

Glossary

Key terms

The midpoint between the buy and sell prices for a currency pair on the interbank market. This is the 'true' exchange rate before any retail spread is applied.
The difference between the mid-market rate and the rate offered to a retail customer, expressed as a percentage. The spread is the primary source of profit for banks on currency exchanges.
The price of one currency expressed in units of another. A USD/EUR rate of 0.92 means one US dollar buys €0.92.
The currency being converted from — the currency you are selling (e.g., USD in a USD/EUR conversion).
The currency being converted into — the currency you are buying (e.g., EUR in a USD/EUR conversion).
A service offered at foreign ATMs and retailers that converts the charge to your home currency at the point of sale, typically at a poor rate. Declining DCC and paying in local currency is almost always better.
About

About this calculator

Part of our finance calculators suite — explore all calculators.

Questions

Frequently asked questions about the free currency converter calculator

A currency converter calculator is a free online tool that helps you convert between major currencies using built-in rates. Static rates for offline use. For live rates, check your bank or a real-time FX service. It runs entirely in your browser with instant results and no sign-up.
No — actual loan terms depend on credit, income docs, and lender underwriting. Use this for planning and what-if scenarios; get a real Loan Estimate before making decisions.
When the calculator asks for them. PITI calculations include property tax, insurance, and PMI; raw P&I calculations don't.
Lenders round payment amounts and may include escrow buffers. Property tax and insurance change over time. Real payments vary 1-5% from these estimates.

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