Understanding the Indian number system (lakh, crore) and its relationship to the international system (million, billion) is essential for finance, exams, and daily use.
India uses a unique number grouping system: after the first 3 digits (hundreds), numbers are grouped in 2s (thousands, lakhs, crores), while the international system groups everything in 3s (thousands, millions, billions).
0.1 lakh = ? 1 lakh = 1,00,000 0.1 lakh = 1,00,000 × 0.1 = 10,000 (Ten Thousand)
100000 spelling: 1,00,000 = One Lakh (Indian system) 100,000 = One Hundred Thousand (International system) Both refer to the same number.
10 crore in number: 1 crore = 1,00,00,000 (7 zeros) 10 crore = 10,00,00,000 = 100,000,000 (8 zeros)
How many zeros in 1 crore? 1 crore = 1,00,00,000 → 7 zeros
| Indian | Value | International |
|---|---|---|
| 1 lakh | 1,00,000 | 100 thousand |
| 10 lakh | 10,00,000 | 1 million |
| 1 crore | 1,00,00,000 | 10 million |
| 10 crore | 10,00,00,000 | 100 million |
| 100 crore | 1,00,00,00,000 | 1 billion |
10 million = 10,000,000 = 1 crore 10 million to lakh = 100 lakh
Memory trick: 1 million = 10 lakh, 1 billion = 100 crore
¼ kg = 0.25 kg = 250 grams
Common use: Recipes, grocery shopping, medical dosing
111 ÷ 3 = 37
Verification: 37 × 3 = 111 ✓
Method:
Alternative: 111 = 90 + 21 = (3×30) + (3×7) = 3 × 37
1 million = 10 lakh, so 1.2 million = **12 lakh**.
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