Hindu numbering system

The Indian numbering system is used in the Indian subcontinent (Bangladesh, Burma, India, Nepal, Maldives, Pakistan and Sri Lanka). The terms lakh or lac (100,000 or 1,00,000 in the Indian system) and crore (10,000,000 or 1,00,00,000 in the Indian system) are used in Indian English to express large numbers. For example, in India 150,000 rupees becomes 1.5 lakh rupees, written as ₹1,50,000 or INR 1,50,000, while 30,000,000 (thirty million) rupees becomes 3 crore rupees, written as ₹3,00,00,000 with commas at the thousand, lakh, and crore levels, and 1,000,000,000 (one billion) rupees (one hundred crore rupees or one arab अरब ) is written ₹100,00,00,000. While there are specific terms for numbers larger than 1 crore, these are not commonly used, and most practitioners are not familiar with these. In common parlance, the thousand, lakh, crore terminology repeats for larger numbers. Thus 1,000,000,000,000 (one trillion) becomes 1 lakh crore, and is written as 1,00,000,00,00,000.

The Indian numbering system uses separators differently from the international norm. Instead of grouping digits by threes in international system, the grouping is done in repeating pattern of 3,2,2 (from least significant digits). This makes the number convenient read using thousand, lakh, crore terminology. Thus:

This accords with the Indian numbering system, which has units for thousands, hundreds of thousands, tens of millions, etc.

The table below follows the short scale usage of one billion being one thousand million. In India, Bangladesh and Pakistan, following former British usage, the long scale was used, with one billion equivalent to one million million.

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