Currency Converter: How Exchange Rates Work (USD to INR and More)

An exchange rate is the price of one currency in another, and the fairest version of it is the mid-market rate: the midpoint between the price at which the market buys a currency and the price at which it sells it. Banks, card issuers, forex counters and money-transfer apps rarely give you that rate. They add a margin, usually hidden inside the rate, and often a fee as well, so US$200 spent on a card or ₹1 lakh sent abroad can cost several per cent more than the headline figure.

The free currency converter gives you the benchmark to measure that markup against. It converts between 20 currencies, including INR, USD, EUR, GBP, AED, SGD, AUD and CAD, using the European Central Bank's daily reference rates. Below is how those rates are set, what the converter can and cannot tell you, and how to work out the real cost of any offer in rupees.

Where the converter's rates come from

It helps to know exactly what number you are looking at, because "live rate" means different things on different sites.

• Source: the converter asks the free Frankfurter service for the latest European Central Bank (ECB) euro reference rates. The ECB publishes these once every working day at around 16:00 Central European Time, which is evening in India. They are not updated minute by minute, and on weekends and ECB holidays you see the last working day's rate. The result line shows the date of the rate used.
• Cross rates: the ECB quotes every currency against the euro, so other pairs are worked out from two euro rates. On 15 October 2026, 1 euro was ₹106.5408 and US$1.1208, so 1 US dollar = 106.5408 ÷ 1.1208 = ₹95.06. That is the USD to INR figure the converter showed that day.
• UAE dirham: the ECB doesn't publish an AED rate. The converter routes it through the US dollar at the dirham's fixed peg of 3.6725 per dollar and says so on the result.
• Purpose: the ECB states that its reference rates are for information only. Nobody will actually exchange money for you at this rate, which is exactly why it is a good neutral yardstick.

If the rate service can't be reached, the converter shows an error asking you to try again rather than an old number.

How exchange rates are set

Currencies trade continuously between banks and large institutions around the world. At any moment there is a bid price (what buyers will pay) and an ask price (what sellers want); the mid-market rate sits halfway between them. Reference rates like the ECB's are snapshots of that market taken at a fixed time each day.

The rupee's price moves with demand for and supply of rupees and dollars. India imports more goods than it exports, and much of that import bill, crude oil in particular, is paid in dollars, which creates steady demand for dollars. Foreign money flowing into or out of Indian shares and bonds pushes the rupee up or down, as do differences in interest rates between India and other countries. The Reserve Bank of India also buys or sells dollars at times to calm sharp swings.

India has its own official benchmark too. Financial Benchmarks India Ltd (FBIL) has published the reference rate for USD/INR and a few other pairs every working day since it took the job over from the RBI in July 2018. Contracts and statements in India often refer to it.

Mid-market rate versus what you actually get

Each way of changing money adds its cost in a different place, which is why comparing them is confusing.

The World Bank figure counts both the fee and the exchange-rate margin, which is the right way to compare: the margin is a cost even when the provider advertises "zero fees".

Worked example 1: the real cost of a card payment

You pay US$200 to a foreign website with a card that charges a 3.5% forex markup plus 18% GST on the markup. Take the converter's rate of ₹95.06 per dollar.

1. Value at the reference rate: 200 × 95.06 = ₹19,012.00.
2. Markup at 3.5%: 19,012 × 0.035 = ₹665.42.
3. GST at 18% on the markup: 665.42 × 0.18 = ₹119.78.
4. Total on your statement: 19,012 + 665.42 + 119.78 = ₹19,797.20, an effective rate of ₹98.99 per dollar.
5. Extra cost: the percentage change calculator with 95.06 → 98.99 shows a 4.13% increase.

Your bank actually converts at the card network's rate for that day, which is close to but not identical to the ECB figure, so treat this as a good estimate rather than the exact statement amount. The lesson holds either way: a 3.5% markup costs a little over 4% once GST is added.

Worked example 2: comparing two transfer quotes

A freelancer is receiving US$1,000 from a client and has two quotes (these are illustrations; real quotes change daily). At ₹95.06, the reference value is ₹95,060.

To get the last column, use the percentage calculator's "X is what % of Y" row with X as the amount received and Y as ₹95,060. Provider A gives 98.67%, so you lose 1.33%; Provider B gives 99.31%, a loss of 0.69%. The provider that charges a fee pays you ₹600 more.

If the money comes through PayPal, the PayPal fee calculator works out the percentage-plus-fixed fee; any currency conversion margin comes on top of that. The freelancer invoice guide covers what every invoice should include, from the due date to payment details.

How to compare any offer in four steps

1. Check the benchmark the same day. Open the converter when you get the quote. The ECB rate is a once-a-day snapshot, so a gap of a few paise can just be the market moving since then; a gap of a rupee or more is markup.
2. Compare the money that arrives, not the fee line. For sending, compare the rupees debited for the same foreign amount; for receiving, compare the rupees credited.
3. Turn the gap into a percentage. Receiving: (reference value − amount received) ÷ reference value × 100. Paying: (amount paid − reference value) ÷ reference value × 100.
4. Ask about charges along the way. International bank transfers can pass through intermediary banks that deduct their own fees, so ask whether the quote is the final amount credited.

Two more habits save money abroad: when a card terminal or ATM offers to charge you in rupees, choose the local currency, and keep using one low-markup card instead of withdrawing cash several times. Large transfers abroad can also attract tax collected at source (TCS) above a threshold. TCS is credited against your income tax, so it isn't a fee, but it does tie up the money until you file your return; ask your bank for the current limit.

What a free converter can't tell you

The converter is a benchmark, not a dealing rate. It doesn't know your bank's margin, it covers 20 currencies rather than every currency in the world, and it updates once per working day. For accounting or tax, use the rate your accountant or the applicable rules specify, not a converter snapshot. For a fixed amount you must pay, confirm the provider's final quote at the moment you send the money.

This is general information about how exchange rates and charges work, not financial advice; fees and markups change, so check your own card and bank terms.

Frequently asked questions

Why is the rate on Google different from my bank's rate?

Search engines and this converter show a mid-market or reference rate. Your bank adds a margin to that rate, and often a fee, so its rate is worse when you buy foreign currency and worse when you sell it.

What is the mid-market rate?

It is the midpoint between the buying and selling prices of a currency in the wholesale market. It has no markup, which makes it the fairest benchmark, but ordinary customers can't usually transact at it.

How often does this currency converter update?

Once every working day, after the European Central Bank publishes its reference rates at around 16:00 Central European Time. The date of the rate is shown next to the result.

What is the official USD to INR rate in India?

The reference rate published each working day by Financial Benchmarks India Ltd (FBIL), which took over the task from the RBI in 2018. Banks still set their own buying and selling rates around the market price.

Should I pay in rupees or the local currency when abroad?

Choose the local currency. If you pick rupees, the merchant's provider does the conversion at a rate you can't check at the counter, and your card may still charge its own fee.

How do I work out the markup on a rate I was offered?

Divide the difference between the offered rate and the reference rate by the reference rate and multiply by 100. An offer of ₹93.80 when the reference is ₹95.06 is 1.26 ÷ 95.06 × 100 = 1.33% below the reference.

Sources: European Central Bank, euro foreign exchange reference rates (15 October 2026); Frankfurter API documentation; SBI Card FAQ on international usage; World Bank, Remittance Prices Worldwide (2025 reports); RBI press release on FBIL taking over reference rates (July 2018).