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Table 6: Numbers greater than or equal to one | Description | Scientific notation | Equivalent value | SI prefix | Abbreviation | | One quadrillion | 1×1015 | 1,000,000,000,000,000 | peta | P | | One trillion | 1×1012 | 1,000,000,000,000 | tera | T | | One billion | 1×109 | 1,000,000,000 | giga | G | | One hundred million | 1×108 | 100,000,000 | | | | Ten million | 1×107 | 10,000,000 | | | | One million | 1×106 | 1,000,000 | mega | M | | One hundred thousand | 1×105 | 100,000 | | | | Ten thousand | 1×104 | 10,000 | | | | One thousand | 1×103 | 1,000 | kilo | k | | One hundred | 1×102 | 100 | hecto | h | | Ten | 1×101 | 10 | deca (deka) | da | | One | 1×100 | 1 | | |
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Table 7: Numbers less than one | Description | Scientific notation | Equivalent value | SI prefix | Abbreviation | | One tenth | 1×10−1 | 0.1 | deci | d | | One hundredth | 1×10−2 | 0.01 | centi | c | | One thousandth | 1×10−3 | 0.001 | milli | m | | One ten thousandth | 1×10−4 | 0.0001 | | | | One hundred thousandth | 1×10−5 | 0.00001 | | | | One millionth | 1×10−6 | 0.000001 | micro | μ | | One ten millionth | 1×10−7 | 0.0000001 | | | | One hundred millionth | 1×10−8 | 0.00000001 | | | | One billionth | 1×10−9 | 0.000000001 | nano | n | | One trillionth | 1×10−12 | 0.000000000001 | pico | p | | One quadrillionth | 1×10−15 | 0.000000000000001 | femto | f |
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