The USA meaning of a

**billion**is a thousand million, or one followed by nine noughts (1,000,000,000). Increasingly in this country we are using the USA meaning of a**billion**for these big numbers, and a trillion for the old UK meaning of one followed by twelve noughts.Herein, how many is One Billion?

The old UK meaning of a billion was a million million, or one followed by twelve noughts (

**1,000,000,000,000**). The USA meaning of a billion is a thousand million, or one followed by nine noughts (1,000,000,000).What is 1 billion in millions?

1,000,000,000 (one billion, short scale; one

**thousand**million or milliard, yard, long scale) is the natural number following 999,999,999 and preceding 1,000,000,001. One billion can also be written as b or bn. In scientific notation, it is written as 1 × 10^{9}.