Currency conversion: at the current rate
Every international purchase, transfer, or trip starts with the same question: how much is my money worth in another currency? A currency converter multiplies your amount by the current exchange rate to give an instant equivalent across major currencies such as EUR, USD, GBP, JPY, CHF, CAD, and AUD, with an optional commission adjustment for realistic net results.
TL;DR
- The base amount is multiplied by the exchange rate between the source and target currency
- Formula: Converted = Amount × Rate | Net Converted = Converted × (1 - Fee % / 100)
- Example 1: Converting €100 to US dollars
How it works
The base amount is multiplied by the exchange rate between the source and target currency. An optional percentage fee is subtracted from the converted result to model bank commissions and card fees, giving a more realistic figure than the advertised rate.
The math
Take the amount in the source currency, multiply by the exchange rate to the target currency, and if a commission is applied, subtract the fee percentage from the result to obtain the net converted amount.
The rate expresses how many units of the target currency one unit of the source currency buys; the fee factor reduces the result to the actual amount received.
Real rates: spread & fees you often forget
The rate you see on ECB (e.g. EUR→USD euro dollar 1.085) isn’t what you pay. Banks/cards add 0.5–2% spread + flat fee. Example: convert €1,000 at 1.085 with 1.5% spread → effective 1.0687 = $1,068.70 not $1,085 (-$16.30). On €5,000 that’s ~$80 lost. Our currency converter with live exchange rates uses open.er-api.com + cache and shows the mid rate; add your bank’s spread for the real net.
| Amount | Mid 1.085 | +1.5% spread | Loss |
|---|---|---|---|
| €1,000 | $1,085.00 | $1,068.70 | $16.30 |
| €5,000 | $5,425.00 | $5,343.50 | $81.50 |
Source: ECB Euro Reference Rates, open.er-api.com (mid). Check your card’s FX fee before travel.
Examples
Example 1: Converting €100 to US dollars
- Amount: €100.00
- Exchange rate: 1.10 USD per EUR
- Converted: 100 × 1.10 = $110.00
- With a 2% commission: 110 × 0.98 = $107.80 net
Example 2: Converting £500 to euros
- Amount: £500.00
- Exchange rate: 1.17 EUR per GBP
- Converted: 500 × 1.17 = €585.00
- With a 1.5% commission: 585 × 0.985 = €576.23 net
When to use it
✦ Travel Budgeting
Travelers convert their planned spending to the local currency and check the impact of card fees and cash exchange commissions.
✦ International Shopping and Transfers
Shoppers and remitters compare the real cost of payments across currencies before confirming transactions.
⚠ Common Currency Conversion Mistakes
- Ignoring Hidden Fees: Airports, credit cards, and cash booths often charge 5-10% above the interbank rate; the advertised rate is rarely what you get.
- Using Stale Rates: Rates move constantly; a conversion from yesterday may be off by several percent for large amounts.
- Forgetting the Inverse: Dividing instead of multiplying with the rate reverses the conversion and produces a wildly wrong result.
FAQ (6)
Are the rates live?
Rates are regularly updated baseline indicators; for large transactions always confirm the real rate with your bank or exchange provider.
What is a commission-free conversion?
It is a conversion at the published rate without an added fee, rare in practice, since banks recover costs through the spread.
If I type my salary or prices here, do you store them?
No — and that's deliberate. Everything runs locally in your browser, nothing leaves your device. We don't see your net salary, your margins, or the VAT numbers you test. For a finance tool that matters: you can run a quick check on a payslip or an invoice while on public Wi-Fi and close the tab knowing no trace is kept server-side.
Can I use it on the train without signal to check an invoice?
Yes. Load the page once, then it works offline. VAT, discount and mortgage math are all pure JavaScript — no API call. I often test it in airplane mode: open the mortgage page, type 250,000 at 4.5% for 25 years, you get the schedule instantly, even in a tunnel.
Can I file taxes with these results?
Use it as a fast sanity check, not as the final filing. Formulas are standard (e.g. Net = Gross / 1+VAT) and verified against official sources listed at the bottom, but rates and thresholds change — Italy's 22% vs Germany's 19%, or IRPEF brackets. For the actual declaration, double-check with your accountant or Agenzia delle Entrate / HMRC / IRS.
How do I send a calculation to my accountant?
Hit 'Share Link' under the results. It encodes the inputs in the URL — e.g. ?price=1200&vat=22 — so your accountant opens the exact same view, no screenshot needed. You can also copy the result with one tap and paste it into an email.
Sources & References
⚠ Financial Disclaimer
This tool provides estimates for informational purposes only and does not constitute financial, tax, or legal advice. Results may vary based on local regulations, rates, and individual circumstances. Always consult a qualified professional before making financial decisions.