A billion is exactly one thousand million, 1,000,000,000, or 109.
U.S. usage | Value | Former British usage |
---|---|---|
thousand | 103 = 1,000 | thousand |
million | 106 = 1,000,000 | million |
billion | 109 = 1,000,000,000 | thousand million or milliard |
trillion | 1012 = 1,000,000,000,000 | billion |
quadrillion | 1015 = 1,000,000,000,000,000 | thousand billion or (very rarely) billiard |
quintillion | 1018 = 1,000,000,000,000,000,000 | trillion |
Categories: [Mathematics] [Units of Measurement]