Currency Notation Converter
Convert a number between Indian (lakh, crore), Western (million, billion), and East Asian (万, 亿) notations at once, with grouped digits and word forms. Free.
Currency Notation Converter
Type plain digits — the tool shows the same value in every notation below. Click any result to copy it.
How to Use the Notation Converter
Type a number
Enter any whole number in the box — for example a figure you read as "5 crore", "2.5 million", or "3000万". Just type the plain digits (50000000, and so on); the tool reads them as you go.
See every notation at once
The same value appears instantly in Indian (lakh/crore), Western (million/billion), and East Asian (万/亿, both simplified and traditional) systems — each with correctly grouped digits and a spelled-out word form.
Use the quick buttons
Tap a preset like "1 crore" or "1亿" to load that value and immediately compare how the three systems express it. It is the fastest way to build intuition for how the groupings line up.
Copy what you need
Click any result — grouped digits or word form — to copy it to your clipboard, ready to paste into a report, message, or spreadsheet for the right audience.
Three Ways the World Groups Big Numbers
Why 10,000,000 Has Three Different Names
The number ten million is written and named very differently depending on where you are, and the difference trips up cross-border business, journalism, and finance constantly. In the Western system, large numbers are grouped in threes and named every three digits: thousand, million, billion, trillion — so ten million is "10,000,000," grouped as 10 million. In the Indian system, used across India, Pakistan, Bangladesh, Nepal, and Sri Lanka, numbers group in twos after the first thousand and use the units lakh (one hundred thousand) and crore (ten million) — so the same figure is "1,00,00,000," read as "one crore." And in much of East Asia — China, Japan, Korea, Taiwan — numbers group in fours, built on 万 / 萬 (ten thousand) and 亿 / 億 (one hundred million), so ten million is "1000万," literally "one thousand ten-thousands." Three completely different mental models for exactly the same quantity. This tool shows all of them side by side, with both the grouped digits and the spoken word form, so you can translate a figure instantly between the systems your readers actually use.
The reason these systems diverge is the size of their basic grouping. The West groups by 10³ (every thousand gets a new comma and, periodically, a new name); India inserts a comma every two digits after the hundreds; East Asia groups by 10⁴ (a new comma every four digits). Because the comma positions differ, the same string of digits is genuinely harder to read in the "wrong" grouping for your region — an Indian reader parses 1,00,00,000 at a glance but has to count zeros in 10,000,000, and vice-versa. The named units compound this: a Western "billion" is 10⁹, which India expresses as "100 crore" and East Asia as "10亿." None of these are wrong; they are just different conventions, and converting between them by hand is error-prone precisely because the boundaries do not line up. Letting software place the commas and pick the unit names removes a whole class of off-by-a-zero mistakes.
"A crore, ten million, and 1000万 are the same quantity wearing three different uniforms. The hard part is never the maths — it is placing the commas where each reader expects them."
Where This Matters
Notation conversion is a daily need for anyone working across these regions. A journalist reporting an Indian company's revenue in crore for a global audience needs the million-and-billion equivalent. A finance team reconciling figures from Chinese filings written in 亿 has to line them up with Western-format spreadsheets. A start-up announcing funding wants the same number to read naturally to investors in Mumbai, San Francisco, and Shenzhen. Even casual readers hit it — anyone reading international news encounters "lakh," "crore," and "亿" and wants a quick sense of scale in familiar terms. Because this converter handles arbitrarily large numbers exactly (it uses precise integer arithmetic rather than floating-point, so it never rounds away digits in huge figures) and runs entirely in your browser, you can paste in any value — including sensitive financial figures — and get every notation at once without sending the number anywhere. It is a small tool for a surprisingly frequent friction point in a connected world.
10 Facts About Number Notations
One crore equals ten million, and one lakh equals one hundred thousand.
The Indian system groups digits in twos after the first thousand: 1,00,00,000.
The Western system groups in threes: thousand, million, billion, trillion.
East Asian numbers group in fours around 万 (10⁴) and 亿 (10⁸).
A Western billion is 100 crore — or 10亿 in Chinese.
万 (simplified) is written 萬 in traditional Chinese; 亿 is 億.
The lakh–crore system is used across India, Pakistan, Bangladesh, Nepal and beyond.
Japan and Korea also use the 10,000-based grouping (万 / 억).
The systems diverge because each has a different basic grouping size.
This tool uses exact integer maths, so even huge numbers convert without rounding.
Frequently Asked Questions
- One crore equals ten million (10,000,000). So 5 crore is 50 million, and 100 crore is one billion. Type the figure in and the tool shows the crore value alongside its Western (million/billion) and East Asian (万/亿) equivalents at the same time, with the digits grouped correctly for each.
- One lakh is one hundred thousand (100,000). Ten lakh make one million, and one hundred lakh make one crore. The Indian system uses lakh and crore as its main large-number units, grouping digits in twos after the hundreds — which is why a lakh is written 1,00,000 rather than 100,000.
- 万 (wàn) means ten thousand (10,000) and 亿 (yì) means one hundred million (100,000,000) in the East Asian numbering system, which groups digits in fours. So ten million is written 1000万 (a thousand ten-thousands). The traditional Chinese forms are 萬 and 億; this tool shows both the simplified and traditional versions.
- Each system has a different basic grouping size. The Western system groups in threes (1,234,567), the Indian system in twos after the first thousand (12,34,567), and the East Asian system in fours (123,4567). The same digits therefore look quite different, which is exactly why converting between them by eye is error-prone — and why this tool places the commas for you.
- One billion (1,000,000,000) equals 100 crore, or 10億/10亿 in East Asian notation. Enter 1000000000 and you will see all three forms side by side. This is a common conversion when reporting large funding rounds or company valuations across Indian, Western, and East Asian audiences.
- Yes. The tool uses exact integer arithmetic (big-integer maths) for the whole-number part, so it never loses precision on huge figures the way ordinary floating-point calculators can. You can convert numbers with dozens of digits and every digit stays correct in all four notations.
- Yes — you can include a decimal part, and it is preserved in the grouped-digit output for each system. The spelled-out word forms (lakh, crore, million, 万, 亿) describe the whole-number part, which is how these units are normally spoken; the decimal is shown alongside the grouped digits.
- The Indian numbering system with lakh and crore is standard across India, Pakistan, Bangladesh, Nepal, Sri Lanka, and other parts of South Asia, and you will see it in their news, finance, and everyday speech. The East Asian 万/亿 system is used in China, Japan, Korea, and Taiwan. The Western million/billion system dominates Europe, the Americas, and most international business.
- No. Every conversion happens in your browser — nothing is uploaded, stored, or logged, so you can safely convert confidential financial figures. The tool also works offline once the page has loaded.
- Completely free, with no account, sign-up, or usage limit. It runs entirely in your browser and collects no data. Convert as many numbers between as many notations as you like.
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