A billion has nine zeros: 1,000,000,000. In the short scale system used in the United States and most English-speaking countries, one billion equals one thousand million. In numerical form, it's written as a one followed by nine zeros. It's a common benchmark in finance, economics, and population statistics.
A billion has 9 zeros in the U.S. numbering system. It’s written as 1,000,000,000. Each group of three zeros represents thousands, millions, and billions. In some countries, like the UK (old system), a billion meant a million million (12 zeros), but now most use 9 zeros too.
