Invoice currency converter with fee estimates
Need to compare an invoice total with a possible payment in another currency? Enter the rate you want to check, state the assumed fees, and keep the estimate separate from the actual settlement.
By Invoodle · Updated · Provider, ECB and UK VAT references reviewed October 2026
Estimate one amount at one checked rate, then deduct assumed percentage and fixed fees in the estimate currency. The rate starts blank; fee inputs start at zero. Optional reference data is daily, not a live transaction quote. This tool does not choose tax/accounting rates, predict settlement, move money or read or save invoice drafts.
Changing or swapping currencies clears the rate and fixed fee. The numeric amount and percentage stay unchanged; recheck their meaning. No reverse-direction provider quote is inferred. Same-currency arithmetic uses 1.
0–1,000,000,000, up to 2 decimals. Converted output must be at most 1,000,000,000,000.
Enter destination units for one source unit. 0.00000001–1,000,000, up to 8 decimals; use a checked rate, not a promise of settlement.
0–100%, up to 2 decimals, applied to the converted amount before the fixed fee. Enter 0 for none; no provider fee is assumed.
0–1,000,000,000, up to 2 decimals, deducted once in INR after the percentage fee. No source-currency fee conversion.
Optional daily reference lookup
Only this button requests ExchangeRate-API. It sends the base currency in the URL, not your amount, fees or page URL. The provider receives your IP address and normal request metadata. Its feed updates daily and is for illustration, not a live bank quote. Requesting it clears any current rate.
Manual assumption (including any rate restored from a link)
Rates By Exchange Rate APIConversion estimate
Enter a checked exchange rate or explicitly request a daily reference. No rate or receipt is assumed.
Converted amount is rounded first to two decimals, then the percentage fee is rounded to two decimals, exact half units up. The balance subtracts that fee and the fixed fee. This fee basis may differ from your provider’s. No FX buffer, benchmark-spread comparison or payment confirmation is calculated.
A calculation link exposes amount, currencies, rate and fees. Typing does not update the URL. A copied reference rate reopens as a manual assumption; its source and update time are not verified by a link.
Try two fictional USD to INR estimates
USD 1,000 at an assumed 80 INR per USD, with a 2% fee. Compare no fixed fee with an additional INR 100 fee. The rate and fees are fictional, not current quotes.
Check the rate’s purpose as well as its value
ExchangeRate-API documents its daily reference feed. The ECB separately warns that its reference rates are informational. HMRC’s UK VAT guidance illustrates why a settlement estimate is not automatically the required tax conversion or a complete foreign-currency VAT invoice. The optional lookup uses ExchangeRate-API, not ECB or HMRC rates.
Review the invoice currency separately
The document editor opens separately. It does not import this estimate, convert existing prices, choose a document mode or create a dual-currency tax breakdown. Review the agreed currency, prices, required particulars and tax treatment before issuing a document.
Open document editorReview foreign-currency invoice limits · Read the storage and sharing explanation
How to convert an invoice amount into another currency
Start with the invoice currency and the currency in which you want the estimate. Enter destination-currency units for one invoice-currency unit. If your checked rate says 1 USD = 80 INR, multiply the USD amount by 80. If you have the rate in the opposite direction, check the quotation carefully before entering it.
The rate starts blank so the page cannot silently select a settlement price. Type a checked assumption or explicitly request the optional daily reference. A rate restored from a calculation link is also a manual assumption, not evidence that a provider still offers it.
- Converted amount = invoice amount × entered exchange rate, rounded to two decimals.
- Percentage fee = rounded converted amount × fee percentage ÷ 100, rounded to two decimals.
- Total assumed fees = percentage fee + fixed fee in the estimate currency.
- Estimated balance after fees = converted amount − total assumed fees.
Worked example: USD to INR with percentage and fixed fees
Use a fictional USD 1,000 invoice and an assumed rate of 80 INR per USD. The converted amount is INR 80,000. A 2% fee on that amount is INR 1,600, leaving INR 78,400. Add an assumed INR 100 fixed fee and the estimated balance becomes INR 78,300.
These figures demonstrate the fee basis used here. They are not a current USD/INR quote or a bank fee schedule. Your provider may apply charges in another currency, deduct them before conversion, include a spread in the quoted rate or charge additional fees. Enter only assumptions that match the scenario you are comparing.
| Assumed fees | Converted amount | Total fees | Estimated balance |
|---|---|---|---|
| 2%; no fixed fee | INR 80,000.00 | INR 1,600.00 | INR 78,400.00 |
| 2% plus INR 100 | INR 80,000.00 | INR 1,700.00 | INR 78,300.00 |
Daily reference rates and provider quotes serve different purposes
The optional lookup uses the ExchangeRate-API open-access feed, which its documentation describes as updating once per day. The page shows the provider update time in UTC and rounds the numeric rate to at most eight decimals. It does not label that data live, guarantee a transaction price or infer a bank spread.
The ECB publishes a different set of reference rates and says they are for information, with transaction use discouraged. The lookup on this page does not use ECB data. Before relying on a payment estimate, check the rate, validity period, currency direction and fee basis in the quote or agreement for your actual transaction.
Reference lookup is optional and sends only the base currency in the request URL; it does not send the invoice amount or fee inputs. The provider still receives normal request metadata such as the IP address. Invalid, mismatched, future-dated or more-than-48-hour-old responses are not applied. A failed lookup leaves no assumed fallback rate. Editing the rate or changing currencies cancels any pending response.
Understand the fee basis, rounding and negative estimates
This model deducts one percentage of the converted amount, followed by one fixed fee in the estimate currency. It does not automatically model sending-bank, intermediary, platform or receiving-bank charges, minimum fees, tiered fees or a rate buffer. A spread already included in a provider rate is not separately measured here.
The converted amount is rounded first, then the percentage fee is rounded; exact half minor units round up. The final balance subtracts the rounded fee and the fixed fee. Different calculation order or provider rounding can produce a different small-amount result. All supported currencies use two-decimal money presentation on this page.
If assumed fees exceed the converted amount, a negative balance is shown as an arithmetic shortfall. It does not predict a negative bank payment. Zero invoice amount and zero fees remain valid, but an exchange rate must be positive. The calculator limits are implementation bounds, not a statement of available market rates.
Keep invoice, settlement and tax conversion decisions separate
Agree the invoice currency, price, payment instructions and responsibility for charges with the client. Keep the quote or rate source, its date and any settlement evidence you need to reconcile the payment. This estimate neither verifies funds received nor prescribes how exchange differences should be recorded in every accounting system.
Tax conversion may have its own rate, timing and presentation rules. HMRC explains UK VAT conversion methods and sterling figures that can be required on foreign-currency invoices. That UK example does not establish worldwide tax treatment, an export exemption or the correct accounting rate for your business.
The Invoodle editor uses one display currency and general document-level tax. It does not import this conversion, convert existing line prices, automatically generate a complete dual-currency VAT breakdown or decide local invoice requirements. Review the required document and use an appropriate workflow where those fields are needed.
One-rate conversion arithmetic, not a transaction quote, receipt confirmation or tax/accounting decision. ExchangeRate-API, ECB and UK HMRC context reviewed October 2026. Examples are fictional; no current exchange rate or fee schedule is asserted.
Frequently asked questions
How do I convert an invoice into another currency?
Multiply the invoice amount by a checked rate expressed as destination units for one source unit. For example, a fictional USD 1,000 at 80 INR per USD gives INR 80,000 before fees. This calculator then deducts your assumed percentage fee and fixed fee in the estimate currency.
Does this converter use live exchange rates automatically?
No. The rate starts blank. You can enter a checked assumption or explicitly request a daily ExchangeRate-API reference. Its provider update time is shown, and the rate is rounded to at most eight decimals. A daily reference is illustrative, not a live bank quote or a guaranteed settlement rate.
How are percentage and fixed transfer fees calculated?
The percentage fee applies to the rounded converted amount and is rounded to two decimals. The fixed fee is deducted once afterward in the estimate currency. A provider that charges before conversion, uses a different currency or applies extra charges needs a separately checked calculation.
What happens when I swap the currencies?
The numeric invoice amount and percentage fee stay unchanged, while the exchange rate and fixed fee are cleared for review. No reverse-direction provider quote is inferred. When both currencies are the same, the arithmetic rate is fixed at 1 and assumed fees can still be deducted.
Can I use this result for VAT, accounting or proof of payment?
This is a planning estimate. It does not select a required tax or accounting rate, generate all foreign-currency invoice particulars or verify payment. Check applicable rules, your agreement and settlement evidence separately. HMRC is linked as a UK VAT example, not a worldwide conversion rule.
Why can the balance be negative or differ by a few cents?
Assumed fees can exceed the converted amount; a negative result then represents an arithmetic shortfall, not a bank payment prediction. The tool rounds conversion first and the percentage fee second, exact half units up. A different provider fee basis or rounding order can give a different result.
Can I share an estimate without changing an invoice draft?
Copy conversion includes the inputs, result, source context and assumptions. Copy calculation link exposes amount, currencies, rate and fees to recipients; typing does not update the URL. A linked rate reopens as a manual assumption. The editor opens separately without importing the estimate or reading or changing your draft.