Exchange Rates Explained: Why the Rupee Rises and Falls Against the Dollar
6 min read / 2026-06-22
An exchange rate tells you how much one country's money is worth compared to another's. Understanding why the rupee's value changes helps make sense of news about NRI deposits, import prices, and RBI decisions.
What it means
An exchange rate is the price of one currency in terms of another. For example, if ₹83 buys one US dollar, the exchange rate is ₹83 per dollar. This number changes every day — sometimes every hour — based on how much people around the world want to buy or sell rupees compared to dollars. When fewer people want rupees, the rupee's value falls. That is called a depreciation (deh-preh-see-AY-shun) of the rupee. When demand for rupees rises, the rupee strengthens — called appreciation. Think of it like the price of a popular snack at your school canteen: if more students want it, the price goes up.
How it works
Currencies are traded every day in what is called the foreign exchange market, or forex market. Banks, companies, and governments all buy and sell currencies there. Several things push exchange rates up or down: • Trade: When India imports (buys) more goods from abroad than it exports (sells), more rupees are sold to buy foreign currency, pushing the rupee down. • Interest rates: Higher interest rates in India can attract foreign investors who want to earn more, so they buy rupees — which strengthens the currency. • Reserves: The Reserve Bank of India (RBI) keeps a store of foreign currencies, mainly dollars. It can sell these dollars and buy rupees to slow a fall in the rupee's value. • Global events: Oil price rises, wars, or a strong US economy can all put pressure on the rupee, since oil is priced in dollars and India imports large amounts of it.
A simple example
Imagine your family orders a mobile phone manufactured in the US. The phone costs $500. If the exchange rate is ₹80 per dollar, your family pays ₹40,000. But if the rupee weakens to ₹85 per dollar, the same phone now costs ₹42,500 — even though the dollar price did not change at all. This is why a weaker rupee makes imports more expensive and can push up prices across the country. On the other hand, a weaker rupee is good for Indian exporters — a software company earning dollars gets more rupees when it converts its earnings back home.
Why people talk about it
Governments and central banks watch exchange rates closely because they affect the whole economy. The RBI does not usually fix a single rate by law, but it does step in to prevent very sharp swings — a system called a managed float. When the rupee falls sharply, the RBI might use its dollar reserves to buy rupees. It might also raise interest rates to attract foreign investment. Another tool, used in crises like 2013, is asking Non-Resident Indians (NRIs — Indians living abroad) to deposit foreign currency in Indian banks. These deposits add to India's dollar reserves and help the RBI stabilise the rupee. That is why understanding exchange rates is the first step to understanding NRI deposit schemes.
What to remember
Exchange rates connect every country's economy to the rest of the world. A small change in the rupee-to-dollar rate can change the price of petrol, electronics, medicines, and school supplies. The RBI uses several tools — reserves, interest rates, and special deposit schemes — to keep the rupee reasonably stable. No tool is free, however: each has tradeoffs, such as adding to India's foreign currency debt or slowing domestic growth. Keeping an eye on the exchange rate is a practical skill for anyone managing a family budget or planning to study or work abroad.
Key words
Exchange rate
The price of one currency expressed in terms of another, e.g. how many rupees equal one US dollar.
Depreciation
A fall in a currency's value relative to other currencies, meaning it buys less foreign money than before.
Foreign exchange reserves
Foreign currencies held by a central bank like the RBI, used to stabilise its own currency or pay international debts.
Managed float
A system where a currency's value is mostly set by the market, but the central bank steps in to prevent extreme swings.
Key facts
- 1The foreign exchange market trades more than $7 trillion every single day, making it the largest financial market in the world.
- 2India's rupee is a 'managed float' currency — the RBI lets market forces set the rate but steps in to reduce extreme swings.
- 3Oil is priced in US dollars globally, so when the rupee weakens, India's oil import bill automatically rises, affecting petrol and transport costs.
- 4A country's foreign exchange reserves act like a savings buffer — India's reserves have at times exceeded $600 billion, giving the RBI room to defend the rupee.
- 5When an Indian student's family sends money for fees abroad, they feel the exchange rate directly: a weaker rupee means higher costs in Indian rupee terms.
Why it matters
Exchange rates affect the price of nearly everything imported — from fuel to phones — and shape decisions made by the RBI, businesses, and families every day.
Sources
- Reserve Bank of India (RBI) — rbi.org.in
- International Monetary Fund (IMF) — imf.org
