Quick answer: One billion is 100 crore, so $1 billion in rupees is the exchange rate multiplied by 100 crore. At about ₹95 per dollar (the rate in mid-October 2026), $1 billion is roughly ₹9,500 crore. Exchange rates change daily, so multiply the current rate by 100 crore for an exact figure.
Billions come up all the time: in lists of the world’s richest people, company valuations, foreign investment announcements and government deals. Here is how to turn any billion-dollar figure into rupees.
How much is one billion?
- 1 billion = 1,000,000,000 (nine zeros)
- 1 billion = 1,000 million
- 1 billion = 100 crore (in the Indian numbering system)
- In the traditional Indian scale, 100 crore is also called one arab.
How to convert $1 billion into rupees, step by step
- Convert the billion into crore. 1 billion = 100 crore, so $1 billion = 100 crore dollars.
- Find the current exchange rate: how many rupees one US dollar buys.
- Multiply. Rate × 100 crore gives the answer in rupees.
Example (October 2026): On 13 October 2026, the European Central Bank’s reference rates implied about ₹95.28 per US dollar (₹106.60 per euro divided by $1.1188 per euro). So:
₹95.28 × 100 crore = ₹9,528 crore (₹95,28,00,00,000).
A handy shortcut: rupees in crore = dollars in billions × exchange rate × 100. For example, $3.5 billion at ₹95 is 3.5 × 95 × 100 = ₹33,250 crore.
Quick reference table
| Exchange rate (₹ per $) | $1 billion in rupees | $10 billion in rupees |
|---|---|---|
| ₹85 | ₹8,500 crore | ₹85,000 crore |
| ₹90 | ₹9,000 crore | ₹90,000 crore |
| ₹95 | ₹9,500 crore | ₹95,000 crore |
| ₹100 | ₹10,000 crore | ₹1 lakh crore |
What the earlier version of this article used
This article first used a rate of ₹66 per dollar, which was close to the rupee’s value around 2016 to 2017. At that rate, $1 billion was ₹6,600 crore, which was correct for the time. At the October 2026 rate of about ₹95, the same billion dollars is worth around ₹9,500 crore, because the rupee has weakened against the dollar since then.
Where to find today’s dollar rate
- Official reference rate: Financial Benchmarks India Ltd (FBIL) publishes the daily USD/INR reference rate, which the Reserve Bank of India also shows on its website (rbi.org.in).
- Your bank’s rate: if you are actually buying or sending dollars, the bank’s rate will differ from the reference rate because of its margin and fees.
- Search engines and currency apps: typing “1 billion USD in INR” into a search engine gives a quick live estimate. The original version of this article recommended this method, and it still works for a rough answer, but use an official or bank rate for real money.
The same method works for other currencies: find how many rupees one unit buys (for example one euro or one pound) and multiply by 100 crore.
For bigger numbers, see our guide to how much 1 trillion dollars is in Indian rupees. If you want to understand currency markets, read our explainer on forex trading rules in India.
Frequently asked questions
How many crore are there in 1 billion?
100 crore. One billion is 1,000,000,000, and one crore is 1,00,00,000.
How much is 1 billion dollars in rupees today?
Multiply today’s rupee-per-dollar rate by 100 crore. At ₹95 per dollar, it is ₹9,500 crore.
How much is 100 billion dollars in rupees?
$100 billion is 10,000 crore dollars. At ₹95 per dollar, that is ₹9,50,000 crore, or ₹9.5 lakh crore.
How many million make a billion?
One thousand. One million is 10 lakh, so one billion is 1,000 × 10 lakh = 100 crore.
Is a billion the same as an arab?
Yes. In the traditional Indian scale, one arab is 100 crore, which equals one billion.
The exchange rate in this article was checked in October 2026 against the European Central Bank’s euro reference rates for 13 October 2026. Rates change daily, so use the current FBIL/RBI reference rate or your bank’s rate for real transactions. This is general information, not financial advice.
