Blue dollar vs MEP: calculate what you’ll pay in Argentina

The best rate on a chart is only useful if you can actually use it to pay. Blue, MEP and your foreign card’s conversion describe different ways of getting or spending pesos. The calculator above puts those differences into a purchase amount, with the fees you enter.

Tucu brings supported local QR payments in Argentina and Brazil into one travel wallet. Scan the code, review the local amount, exchange rate, payment fee and dollar total, then confirm. Join Tucu’s waiting list for early access.

How the calculator works

Choose the question you need to answer:

• Price in pesos: enter the merchant’s peso price. The calculator estimates how many US dollars you would need after exchanging cash at the blue buying reference, or paying with a foreign Visa card at Visa’s published reference. Enter your card’s extra fee and any percentage deducted when you exchange cash. Both fees start at zero.
• Dollars to pesos: enter the dollars you would hand over. The calculator uses each reference’s buying side, compra, and shows the pesos before provider fees.
• Pesos to dollars: enter the pesos you would hand over. The calculator uses the selling side, venta, and shows the dollars before provider fees.

For a peso purchase, dollars needed are rounded up to the cent. Exchange proceeds are rounded down to the received currency’s cent. The comparison uses the same purchase price for both methods, so it does not assume a cash discount, a card surcharge or a tax benefit.

A published reference is not an offer you can necessarily obtain. Blue is an informal-market reference. MEP is a securities-market reference, not a tourist exchange counter. The official series is a published reference, not the quote from every bank. Ask your provider for the final amount you will receive.

Cash acquisition costs at home, travel to an exchange, ATM charges, fixed fees and the cost of converting another home currency are outside the calculator. Add them before making a decision. For a cash quote, use the offer checker to compare its buying rate with the blue reference.

How current are the rates?

The page checks for updates every five minutes while it is open. Each series shows its own source timestamp in Argentina time, and a reference older than 24 hours is labelled. A refreshed page does not mean every market has traded again: quotes can remain unchanged overnight, over a weekend or on a holiday.

DolarAPI supplies the blue, MEP and official references. ArgentinaDatos supplies the daily history, including weekend entries. They share a maintainer and should not be treated as two independent confirmations. The chart uses buying rates and a cropped vertical axis to make small differences visible; its daily table gives the exact values. Missing data is not filled in.

The Visa comparison uses its published conversion for the displayed rate date. It is an estimate for a USD-billed card, not a promise about your final statement. If a source is unavailable, the page says so. If a refresh fails after a successful load, it retains the previous references with their dates.

Blue dollar, MEP and official: what each rate means

All three are quoted as Argentine pesos per US dollar. A higher buying rate gives you more pesos when you hand over dollars, before fees. When buying dollars with pesos, a lower selling rate costs you fewer pesos.

The Banco Central lists licensed exchange houses and agencies. BYMA describes securities-market data. Use an identifiable provider and agree on the final proceeds before handing over money.

Compra or venta: which side applies to you?

Read the quote from the exchange provider’s perspective. If you hand over dollars and receive pesos, it is buying your dollars, so use compra. If you hand over pesos and receive dollars, it is selling you dollars, so use venta.

For an illustrative quote of 1,500 compra and 1,520 venta, US$100 exchanged into pesos gives ARS150,000 before fees. Buying US$100 costs ARS152,000. Using the wrong side would overstate what your dollars buy.

The offer checker above is for handing over US dollars and receiving pesos. It compares the quoted buying rate before separate fees. Ask how many pesos you will receive in total, rather than comparing a headline rate alone.

Why your foreign card’s rate can differ from MEP

Argentina has a separate conversion framework for purchases with cards issued abroad. Visa’s explanation describes a preferential rate below the rate resulting from MEP. Its numerical example dates from December 2022, so it should not be used as today’s comparison.

Our September 2026 research compared Visa’s published rate with the daily MEP buying series. Visa was between 5.5% and 6.9% below that reference across the month. That is a dated finding, not a fixed spread you can assume for every future payment. The calculator uses the displayed Visa reference instead.

Payway describes the foreign-card scheme for Visa, Mastercard, Cabal and Discover. Networks and card providers can apply different conversions; a Visa estimate should not be treated as a Mastercard, Amex, Wise or Revolut quote. American Express explains that its adjustment can occur after the initial charge.

Your issuer may add a foreign-transaction fee. Enter it in the calculator and check the final posted amount, not only the pending authorisation. To work out your effective rate afterwards, divide the peso purchase amount by the final amount billed in dollars. For another billing currency, compare in that currency instead.

Choose pesos at the terminal

A terminal may offer to charge in your home currency. That is dynamic currency conversion, with a conversion offered by the merchant’s provider. Choosing ARS leaves conversion to your card route. Read the currency and total before confirming. Visa’s DCC guidance.

The “dólar tarjeta” trap

A headline called dólar tarjeta commonly describes the official rate plus the tax perception associated with Argentine residents’ covered foreign-currency spending. It is not the conversion for a foreign visitor buying lunch in pesos. The calculator does not use that series as its card rate. ARCA on who the perception applies to.

When the payment method matters more than the rate

Ask the merchant which price applies to cash, card and transfer before ordering or booking. A lower cash or transfer price changes the comparison; it should not be assumed from the exchange rates alone. Argentine bank and wallet promotions may have account, card and eligibility conditions that a visiting traveller does not meet.

Qualifying accommodation deserves a separate check. Eligible nonresident tourists can receive Argentina’s VAT benefit on qualifying accommodation and included breakfast, subject to the property, documentation and payment conditions. Foreign-issued credit or debit cards and qualifying foreign-currency transfers can meet the payment requirement. Local QR payments and cash do not qualify for that benefit. ARCA’s accommodation guidance and the governing resolution.

For a room priced at ARS100,000 before 21% VAT, the tax-inclusive total is ARS121,000. Removing ARS21,000 saves about 17.4% of that inclusive bill. Check whether the price already excludes VAT before deducting it again. The calculator above does not apply this accommodation benefit.

For cash collection, our Western Union guide explains quotes, promotions and collection. ATMs add another layer: the operator’s charge, your issuer’s charge and the withdrawal limit can make a small withdrawal expensive. Use the Argentina ATM fee calculator to count repeated charges and compare two offers. An ATM cash advance from a credit card may also carry interest.

Pay the local QR. Know the total in dollars.

The QR on the counter should be part of your trip. Tucu gives travellers a way to pay supported Argentine merchant codes without opening an Argentine bank account, with Pix in Brazil in the same wallet.

• Pay in pesos, see the cost in dollars. Review the merchant, local amount, exchange rate, payment fee and dollar total before you confirm. Funding costs are shown when you add money.
• Get ready before the counter. Set up your wallet and complete identity verification before your first payment.
• Keep the same wallet for your next stop. Use Tucu for supported QR payments in Argentina and Pix in Brazil.

Keep a card and some cash for purchases that need another method. Our Argentina QR guide, Mercado Pago guide and alias payment guide explain the different payment routes.

I’m Zbigniew, Tucu’s founder. I build digital products and travel across South America. I want the payment to be the easy part of your next stop.

Tucu is preparing for launch in Argentina and Brazil. Join the waiting list for early access and tell us when you are travelling.

Frequently asked questions

Can I get the blue dollar rate with a foreign card?

The blue dollar is a cash-market reference. A foreign card has a separate conversion route. Compare its network or provider’s rate and your issuer’s fees rather than assuming it matches blue.

Does MEP show what my Visa card will charge?

No. The calculator displays Visa’s published reference separately from MEP. Enter your issuer’s additional fee and check the final posted transaction. Other card providers may use a different rate.

Is the calculator a live exchange offer?

No. It uses the latest available published references with their source dates. An exchange provider can offer a different rate or charge a fee. MEP is a market benchmark, and blue is an informal-market reference.

Why do the rates sometimes stop changing?

Markets can be closed, or the upstream source may not have published another update. Each rate keeps its own timestamp. Older references are labelled, and unavailable references are not replaced with invented prices.

Does this calculator show Tucu’s payment rate?

The calculator compares published cash and Visa references. Tucu shows the price for each supported payment before confirmation, including the exchange rate, payment fee and dollar total. Join the waiting list for early access.

What if my card is billed in euros or pounds?

This calculator compares US dollars and Argentine pesos. Your provider’s conversion into euros, pounds or another currency can differ. Use its own quote and include any additional conversion or transaction fee.

---

Calculator feeds and Visa, Payway and ARCA help pages checked 7 October 2026. The September card-rate comparison is the dated research completed on 1 October, using Visa and ArgentinaDatos. Current rates display their own source timestamps. Calculations are reference estimates, not executable exchange offers.