About this tool
The Lakh Crore to Million Billion Converter instantly translates numbers between the Indian numbering system (Thousand → Lakh → Crore → Arab → Kharab) and the International system (Thousand → Million → Billion → Trillion). Essential when reading global financial news or comparing Indian salaries with international figures.
Two number systems, one number
The confusion is real because the two systems group digits differently. The international system groups in threes (thousand, million, billion, trillion), so commas fall every three digits: 1,000,000. The Indian system groups the last three digits and then in twos (thousand, lakh, crore, arab), so commas fall as 10,00,000. The same quantity, ten lakh, is written 10,00,000 in India and 1,000,000 abroad and read aloud as one million. Past the thousands place the two systems never line up, which is why a headline figure in crore needs converting before it makes sense to an international reader, and vice versa.
The anchors worth memorising are simple: 1 crore equals 10 million, and 100 crore equals 1 billion. From there everything else follows by multiplying or dividing by ten. This tool does the arithmetic for you and also prints the number with the correct commas for each system, so you can copy a value straight into Indian or international writing.
Conversion key
1 lakh = 100 thousand (1,00,000 = 100,000) 10 lakh = 1 million (10,00,000 = 1,000,000) 1 crore = 10 million (1,00,00,000 = 10,000,000) 100 crore = 1 billion (1,00,00,00,000 = 1,000,000,000) 1 lakh crore = 1 trillion (10^12)
Worked example
An Indian company reports annual revenue of 4,500 crore and you need the figure for an international report.
- Start: 4,500 crore.
- Crore to million: 1 crore is 10 million, so multiply by 10 to get 45,000 million.
- Million to billion: divide by 1,000 to get 45 billion.
- Cross-check: 100 crore is 1 billion, so 4,500 crore divided by 100 is 45 billion. Same answer.
- Write it out: 4,500,00,00,000 in the Indian format, 45,000,000,000 in the international format.
Conversion milestones
| Indian | International | Number |
|---|---|---|
| 1 lakh | 100 thousand | 1,00,000 |
| 10 lakh | 1 million | 10,00,000 |
| 1 crore | 10 million | 1,00,00,000 |
| 10 crore | 100 million | 10,00,00,000 |
| 100 crore (1 arab) | 1 billion | 1,00,00,00,000 |
| 1 lakh crore | 1 trillion | 10^12 |
Common pitfalls
- Off by ten between crore and million. A crore is 10 million, not 1 million. Forgetting the factor of ten understates a crore figure tenfold.
- Wrong comma placement. Indian grouping is 10,00,000; international is 1,000,000. Mixing the two makes a number ambiguous or wrong.
- "Billion" once meant a million million. The old British long-scale billion was 10^12. Modern usage everywhere is the short-scale 10^9 (100 crore), so always treat billion as 100 crore today.
- Currency is not part of the conversion. Converting crore to billion is a units change, not a rupee-to-dollar exchange. Apply the exchange rate separately if you are also changing currency.
- Arab and kharab. Beyond crore the Indian system uses arab (100 crore) and kharab (10,000 crore). These are rarely used in finance, where figures stay in crore or lakh crore.
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Frequently asked questions
How many lakhs are in a million?
One million equals 10 lakh, because a lakh is 1,00,000 (100 thousand) and a million is 1,000,000. So 10 lakh and 1 million are the same quantity, just written and grouped differently. A common mistake is to treat a lakh as a million; it is only a tenth of one.
How many crores are in a billion?
One billion equals 100 crore. A crore is 10 million, so ten crore make 100 million and one hundred crore make 1 billion. This is the single most useful anchor for converting Indian financial figures: divide a crore amount by 100 to get billions, or multiply a billion amount by 100 to get crore.
Why are the commas placed differently in Indian numbers?
The Indian system groups the last three digits, then in twos, so ten lakh is written 10,00,000. The international system groups in threes, so the same number is 1,000,000. Past the thousands place the comma positions never match, which is why a figure written in one style can look wrong to a reader used to the other.
What is 1 lakh crore in the international system?
One lakh crore is 1 trillion (10 to the power 12). A lakh crore is 1,00,000 multiplied by 1,00,00,000, which equals a one followed by twelve zeros. Large Indian figures such as government budgets and national GDP are often quoted in lakh crore, so this is the conversion you need to read them as trillions.
Does converting crore to billion change the currency?
No. Converting between crore and billion is only a change of number scale, not of currency. 100 crore rupees is 1 billion rupees, and 100 crore dollars is 1 billion dollars. If you also need to switch from rupees to dollars, apply the exchange rate as a separate step after the units conversion.