Billion to million
1 billion = 1,000 million
Type a value in billion (B) to get million (M) straight away. Both units belong to indian number units, measured here against the one.
1 B = 1,000 M
Formula
M = B × 1,000
One billion is 1,000 million, so multiply the billion value by that factor. Here B is the value in billion and M is the result in million.
Worked example: 1 billion × 1,000 = 1,000 million.
Billion to million table
| billion (B) | million (M) |
|---|---|
| 1 B | 1,000 M |
| 2 B | 2,000 M |
| 3 B | 3,000 M |
| 4 B | 4,000 M |
| 5 B | 5,000 M |
| 6 B | 6,000 M |
| 7 B | 7,000 M |
| 8 B | 8,000 M |
| 9 B | 9,000 M |
| 10 B | 10,000 M |
| 15 B | 15,000 M |
| 20 B | 20,000 M |
| 25 B | 25,000 M |
| 30 B | 30,000 M |
| 40 B | 40,000 M |
| 50 B | 50,000 M |
| 60 B | 60,000 M |
| 75 B | 75,000 M |
| 100 B | 100,000 M |
Everyday billion in million
| What it is | B | M |
|---|---|---|
| 100 crore | 1 B | 1,000 M |
| a mid-size listed company | 5 B | 5,000 M |
| 1,000 crore | 10 B | 10,000 M |
| 10,000 crore | 100 B | 100,000 M |
| one trillion | 1,000 B | 1,000,000 M |
Quick estimate in your head
Multiply by 10^3: move the decimal point 3 places right (add 3 zeros).
Watch out for
- Billion here is the short scale, 10⁹. Older British usage once meant 10¹².
About the units
Billion (B). 1,000,000,000 (10⁹), equal to 100 crore. The short-scale billion used today.
Million (M). 1,000,000 (10⁶), equal to 10 lakh. Used for international figures.
Going the other way, 1 million is 0.001 billion.
Questions
How many million are in 1 billion?
1 billion is 1,000 million, and 1 million is 0.001 billion.
How do I convert billion to million?
Use M = B × 1,000. For example, 1 billion × 1,000 = 1,000 million.
How are lakh and crore written with commas?
Indian notation groups the last three digits, then pairs: 1,00,000 is one lakh and 1,00,00,000 is one crore. Internationally the same numbers are 100,000 and 10,000,000.
How much is one trillion in million?
1,000 B is 1,000,000 M.
Source for the conversion factor: RBI glossary and Indian numbering conventions.