conversions · 1 min read · India
Why 1,00,00,000 has commas in the wrong places
One crore is 10,000,000, written 1,00,00,000 in Indian grouping. The Indian system groups the first three digits then two at a time; the international system groups three throughout. One crore is ten million and one lakh is a hundred thousand, but there is no single word for a million in the Indian system and none for a lakh in the international one.
Indian numbers put the first comma after three digits and every comma after that two digits later: 1,00,00,000. To a reader used to 10,000,000 that looks like a typo. It is a different grouping of the same quantity, and the grouping follows the words rather than the other way round.
| Value | Indian | International | Indian word | International word |
|---|---|---|---|---|
| 1,000 | 1,000 | 1,000 | thousand | thousand |
| 100,000 | 1,00,000 | 100,000 | lakh | hundred thousand |
| 1,000,000 | 10,00,000 | 1,000,000 | ten lakh | million |
| 10,000,000 | 1,00,00,000 | 10,000,000 | crore | ten million |
| 1,000,000,000 | 1,00,00,00,000 | 1,000,000,000 | hundred crore | billion |
Each system groups digits to match the scale words it actually has. The international system names a new unit every three digits, so it groups in threes. The Indian system names a new unit every two digits after the first thousand, so it groups three then twos. Neither is a translation of the other: a million has no single Indian word and a lakh has no single international one, which is why converted figures change shape rather than merely changing name.
The conversions worth memorising
- 1 lakh = 100,000 = 0.1 million
- 10 lakh = 1 million
- 1 crore = 10 million
- 100 crore = 1 billion
- 1 lakh crore = 1 trillion
The pattern that makes the rest easy: ten lakh is a million, and a hundred crore is a billion. Everything else follows from those two.
Where it bites
Spreadsheets and programming languages format in the international system by default, so an Indian figure pasted into one silently regroups. A budget line of ₹1,00,00,000 becomes 10,000,000, which is the same number and no longer reads as a crore to anyone scanning the column. Financial reporting in India often sidesteps this by stating the unit at the top of the table, in lakh or in crore, and giving the numbers without scale words at all.