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Indian Number System Converter

Numbers

Convert between Indian naming units (Lakh, Crore, Arab) and International units (Million, Billion, Trillion) instantly. For finance in India.

Reviewed by the thecalcu.com team · Last updated 4 July 2026

🇮🇳This tool is specific to India
From
To
All conversionsfor 1 Crore (1,00,00,000)
One10000000
Thousand10000
Lakh (1,00,000)100
Ten Lakh (10,00,000)10
Crore (1,00,00,000)1
Ten Crore (10,00,00,000)0.1
Arab (1,00,00,00,000)0.01
Kharab0.0001
Neel0.000001
Padma1.0000e-8
Shankh1.0000e-10
Million10
Billion0.01
Trillion0.00001
Quadrillion1.0000e-8
Quintillion1.0000e-11

What is a Indian Numbers?

The Indian Number System Converter lets you instantly convert between Indian naming units, Lakh, Crore, Arab, Kharab, Neel, Padma, and Shankh, and the International naming units, Million, Billion, Trillion, Quadrillion, and Quintillion. India follows a distinct positional number system where groupings shift to two digits after the first three, producing unit names that have no direct equivalent in the Western system. A figure like ₹45,00,00,000 reads as "45 Crore" in India and "450 Million" internationally, the same amount, expressed in completely different language.

This divergence causes genuine confusion: Indian professionals reading global reports, NRIs navigating between domestic and international financial contexts, students studying international economics, and businesses dealing with cross-border transactions all routinely need to translate between the two systems. The Indian number system is officially used by the Reserve Bank of India, the Income Tax Department, SEBI, NSE, BSE, and all government financial documents. The International system appears in IMF reports, global equity research, and foreign media coverage of Indian companies.

This converter covers all units from One up to Shankh (10^17) on the Indian side and up to Quintillion (10^18) on the international side, enough range to handle everything from salary comparisons to national GDP figures. For converting between number bases (binary, hexadecimal, octal), see the Number Base Converter.

Why Use a Indian Number System Converter?

The mismatch between Indian and International number naming is a persistent source of errors. A startup founder reading that their competitor raised "$2 Billion" needs to contextualise that as ₹200 Crore, and doing that mental arithmetic reliably under pressure is harder than it sounds. A finance student comparing India's GDP ($3.7 Trillion) with government budget documents (₹37 Lakh Crore) needs to verify they are reading the same figure.

Common pain points this converter solves:

  • Investment reports: Mutual fund factsheets list AUM in Crore; global fund comparisons use Billion. Converting lets you benchmark Indian funds against international peers.
  • Business valuation: Startup valuations reported in Indian media use Crore; international press and VC reports use Million or Billion.
  • Government budgets: The Union Budget uses Lakh Crore; international coverage translates it to Trillion, and the two do not always match due to rounding.
  • Salary comparisons: Executive compensation in global companies is quoted in Million; Indian equivalents are in Lakh or Crore.

For calculations involving these amounts, such as GST on large transactions, the GST Calculator works directly with Indian currency figures.

Who Should Use This Converter?

Finance professionals and CAs working with both Indian regulatory filings (in Lakh/Crore) and international reports (in Million/Billion) will use this daily. SEBI filings, RBI disclosures, and MCA documents all use Indian units; Bloomberg, Reuters, and global research uses International units.

Students and researchers studying Indian macroeconomics, comparing GDP figures, or reading World Bank and IMF data alongside domestic sources need a reliable way to convert without mental arithmetic errors.

NRIs and expats regularly translate Indian financial news, family property values, mutual fund portfolios, inheritance figures, into terms familiar from their country of residence. A ₹75 Lakh home becomes $90,000; a ₹5 Crore portfolio is $600,000.

Journalists and content creators covering Indian business, startups, or government policy for international audiences (or vice versa) need accurate, instant conversion to contextualise figures for their readers.

Entrepreneurs and startup founders pitching to international investors or reading global market research in Indian context will frequently need to translate between the two systems. If you are modelling investment growth in these units, the Compound Interest Calculator and SIP Calculator both work with Indian amounts directly.

What Insights Does the Indian Numbers Converter Give You?

The converter shows you the precise converted value to full decimal precision, useful when the conversion does not land on a round number. For example, 7.5 Crore = 75 Million exactly, but 3 Lakh = 0.3 Million, and seeing "0.3" rather than guessing "about a third" matters in financial contexts.

The reference table below the converter displays all 16 units simultaneously, so you can scan the full equivalence chart in one view: see at a glance that 1 Lakh = 0.1 Million, 10 Lakh = 1 Million, 1 Crore = 10 Million, and so on. This is especially useful when orienting yourself to a new scale, for instance, understanding where "Arab" and "Kharab" sit relative to Billion and Trillion.

A practical orientation guide: in everyday Indian financial life, Lakh is the unit for salaries and small investments, Crore is the unit for real estate and business turnover, and Lakh Crore (= Trillion) is the unit for government budgets and national GDP. Anything above 100 Crore starts to appear in large corporate earnings; anything above 1,000 Crore (10 Billion) is major conglomerate territory.

How to use this Indian Numbers calculator

  1. Open the converter, it loads with Crore in the FROM field and Million in the TO field by default.
  2. Select your source unit from the FROM dropdown on the left. Units are grouped into Common, Indian, and International for easy navigation.
  3. Type your value in the input field next to the FROM dropdown. The result updates instantly as you type.
  4. Select your target unit from the TO dropdown on the right.
  5. Read the converted value displayed in the result panel. For example, entering 5 with FROM set to Crore and TO set to Million shows 50.
  6. Use the ⇅ swap button between the two panels to reverse the conversion direction, useful when you want to convert back.
  7. Scroll down to the reference table to see your input unit converted into all other units simultaneously, helpful for understanding the full scale of a number.

Formula & Methodology

All units in this converter are linear multiples of the base unit One (1). Every conversion uses the formula:

Result = Input × (toBase_from ÷ toBase_to)

Key toBase multipliers:

| Unit | System | Value (= toBase) |
|---|---|---|
| One | Common | 1 |
| Thousand | Common | 1,000 |
| Lakh | Indian | 1,00,000 |
| Ten Lakh | Indian | 10,00,000 |
| Crore | Indian | 1,00,00,000 |
| Ten Crore | Indian | 10,00,00,000 |
| Arab | Indian | 1,00,00,00,000 |
| Kharab | Indian | 1,00,00,00,00,000 |
| Neel | Indian | 10,00,00,00,00,000 |
| Padma | Indian | 10,00,00,00,00,00,000 |
| Shankh | Indian | 10,00,00,00,00,00,00,000 |
| Million | International | 10,00,000 |
| Billion | International | 1,00,00,00,000 |
| Trillion | International | 10,00,00,00,00,000 |
| Quadrillion | International | 10,00,00,00,00,00,000 |
| Quintillion | International | 10,00,00,00,00,00,00,000 |

Worked example, 5 Crore to Million:

Result = 5 × (10,000,000 ÷ 1,000,000)        = 5 × 10        = 50 Million

Quick reference, Indian ↔ International equivalences:

| Indian | International |
|---|---|
| 1 Lakh | 0.1 Million |
| 10 Lakh | 1 Million |
| 1 Crore | 10 Million |
| 10 Crore | 100 Million |
| 100 Crore (1 Arab) | 1 Billion |
| 1,000 Crore (10 Arab) | 10 Billion |
| 10,000 Crore (1 Kharab) | 100 Billion |
| 1 Lakh Crore (10 Kharab) | 1 Trillion |
| 1 Neel | 10 Trillion |
| 1 Padma | 1 Quadrillion |
| 1 Shankh | 100 Quadrillion |

No assumptions or rounding: all multipliers are exact integer powers of 10, so every conversion result is mathematically precise. The Home Loan EMI Calculator and other financial tools on this site accept amounts in Indian units directly.

Frequently Asked Questions

The Indian number system is a positional numeral system that uses unique naming units, Lakh, Crore, Arab, Kharab, Neel, Padma, and Shankh, rather than the Million, Billion, Trillion progression of the International system. The grouping follows a pattern of 2 digits after the first three: 1,00,000 (one lakh) instead of 100,000 (one hundred thousand). This system has been in use across the Indian subcontinent for centuries and is officially recognised in India, Pakistan, Bangladesh, Nepal, and Sri Lanka.
The key difference lies in how large numbers are grouped and named. The International system groups digits in threes (Thousand, Million, Billion, Trillion), while the Indian system groups the first three digits and then groups in twos after that (Thousand, Lakh, Crore, Arab). As a result, 1 Crore equals 10 Million, and 1 Arab equals 1 Billion, the names diverge at the million mark and above. Both systems share the same Thousand (1,000).
1 Crore equals 10 Million. To convert crore to million, multiply by 10, so 5 Crore is 50 Million and 25 Crore is 250 Million. This is one of the most frequently searched conversions in India, particularly when comparing Indian financial figures with international headlines or stock market reports.
10 Lakh equals 1 Million. Since 1 Lakh is 1,00,000 (100,000) and 1 Million is 10,00,000 (1,000,000), the ratio is exactly 10. So 2.5 Lakh equals 0.25 Million, and 50 Lakh equals 5 Million. This conversion is commonly needed when reading international salary benchmarks or global market cap figures.
1 Billion equals 100 Crore (also written as 1 Arab in the Indian system). Since 1 Billion is 1,000,000,000 and 1 Crore is 10,000,000, dividing gives exactly 100. When global news reports a company's valuation in billions, multiplying by 100 gives the equivalent in crore, a figure more intuitive for Indian readers.
After Crore, the Indian system has Ten Crore (10 Crore), followed by Arab (100 Crore = 1 Billion), Ten Arab, Kharab (100 Arab = 100 Billion), Neel (100 Kharab), Padma (100 Neel = 1 Quadrillion), and Shankh (100 Padma). In everyday use, Arab is occasionally seen in government budget discussions, while Kharab and above are largely academic or historical.
Yes. The Reserve Bank of India, the Income Tax Department, and all central and state government financial documents use Lakh and Crore as the standard naming convention. Indian stock exchanges (NSE and BSE), mutual fund fact sheets, and company annual reports all report figures in Lakhs or Crores. The International System (Million, Billion) appears mainly in global comparisons or foreign-facing communications.
Multiply the number of Billions by 100 to get Crores. For example, ₹4.5 Billion equals ₹450 Crore, and ₹12 Billion equals ₹1,200 Crore. This is useful when reading foreign direct investment figures, startup valuations reported in global media, or IMF and World Bank economic reports about India.
Select your source unit from the FROM dropdown (for example, Crore), enter your value in the input field, then select your target unit in the TO dropdown (for example, Million). The result updates instantly. You can also use the swap button (⇅) to reverse the direction, and the reference table below the converter shows all units simultaneously for quick comparison.
All units are linear multiples of one (1), so the formula is: Result = Input × (toBase_from ÷ toBase_to). For Crore to Million: Result = Input × (10,000,000 ÷ 1,000,000) = Input × 10. For Lakh to Million: Result = Input × (100,000 ÷ 1,000,000) = Input × 0.1. The same principle applies to any pair of units in the converter.
Arab (also spelled Arba) is a large-number unit in the Indian system equal to 100 Crore, or 1,000,000,000, exactly equivalent to 1 Billion in the International system. It appears in Indian macroeconomic discussions, particularly for national GDP comparisons and government expenditure budgets, though Crore remains the more common unit in everyday financial reporting.
1 Trillion equals 1 Lakh Crore (10,000 Crore, or 10 Kharab) in the Indian system. India's annual Union Budget is often reported in 'lakh crore' figures, for example, a ₹50 lakh crore budget is ₹50 Trillion. The term 'lakh crore' is widely used in Indian newspapers and government press releases for this reason.
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