4.2 billion = 4,200 million. 4.2 billion is 4,200,000,000 in digits, written 4,20,00,00,000 in the Indian system.
How to convert billion to million
million = billion × 1,000
- 1 billion = 1,000 million (and 1 million = 0.001 billion).
- Multiply the amount by the factor: 4.2 × 1,000 = 4,200.
- Answer: 4.2 billion = 4,200 million.
Indian and international place values
| Indian | Digits (Indian) | 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 arab) | 1,00,00,00,000 | 1 billion |
| 1 lakh crore | 1,00,00,00,00,000 | 1 trillion |
Billion to Million table
| Billion (billion) | Million (million) |
|---|---|
| 3.7 billion | 3,700 million |
| 3.8 billion | 3,800 million |
| 3.9 billion | 3,900 million |
| 4 billion | 4,000 million |
| 4.1 billion | 4,100 million |
| 4.2 billion | 4,200 million |
| 4.3 billion | 4,300 million |
| 4.4 billion | 4,400 million |
| 4.5 billion | 4,500 million |
| 4.6 billion | 4,600 million |
| 4.7 billion | 4,700 million |
| billion | million |
|---|---|
| 1 billion | 1,000 million |
| 2 billion | 2,000 million |
| 5 billion | 5,000 million |
| 10 billion | 10,000 million |
| 50 billion | 50,000 million |
| 100 billion | 100,000 million |
Good to know
1 lakh = 100,000 (1,00,000) and 1 crore = 10 million (1,00,00,000).
1 million = 10 lakh, 1 billion = 100 crore, 1 trillion = 1 lakh crore.
The Indian system groups digits in twos after the first three (15,00,00,000); the international system groups in threes (150,000,000).