Million to Billion Converter

Convert millions to billions and billions to millions, and avoid the translation trap where 'billion' means a thousand times more.

1 billion = 1,000 million

Million

Result will appear here...

1,000 Million = 1 Billion

A million has six zeros and a billion has nine, so a billion is a thousand millions. Divide millions by 1,000 to get billions (2,500 million is 2.5 billion). Multiply billions by 1,000 to go back (0.8 billion is 800 million).

Billions = Millions ÷ 1,000

Millions = Billions × 1,000

Million to Billion Table

Millions converted to billions
Million	Billion	In digits
1 million	0.001	1,000,000
10 million	0.01	10,000,000
100 million	0.1	100,000,000
250 million	0.25	250,000,000
500 million	0.5	500,000,000
750 million	0.75	750,000,000
1,000 million	1	1,000,000,000
1,500 million	1.5	1,500,000,000
2,500 million	2.5	2,500,000,000
10,000 million	10	10,000,000,000
100,000 million	100	100,000,000,000

Worked Example: Comparing a Million and a Billion Figure

One report says a project cost $850 million. Another says a rival project cost $1.2 billion. How much more did the rival cost?

Step 1: Put both in the same unit

$1.2 billion × 1,000 = $1,200 million

Step 2: Compare

$1,200 million − $850 million = $350 million (41% more)

The rival cost $350 million more. Headlines that mix units, such as "$850M vs $1.2B", make the gap look smaller than it is.

Short Scale vs Long Scale

There are two systems for naming large numbers. The short scale, used in English today, adds a new name every three zeros: million (10⁶), billion (10⁹), trillion (10¹²). The long scale, still used in most of continental Europe and Latin America, adds a new name every six zeros, so its "billion" is 10¹², a million million.

Britain used the long scale until 1974, when the government officially adopted the short-scale billion. Older British books and documents may use "billion" to mean a million million.

"Billion" in Other Languages

Translating "billion" word for word is a classic error. A French or German "billion" is the English trillion. Here is what each language calls 10⁹ and 10¹²: