Dave's Math Tables: Number Notation (Math | General | NumberNotation)

### Hierarchy of Numbers

```0(zero) 1(one) 2(two)   3(three) 4(four)
5(five) 6(six) 7(seven) 8(eight) 9(nine)
10^1(ten)  10^2(hundred)  10^3(thousand)

name             American-French  English-German
million          10^6             10^6
billion          10^9             10^12
trillion         10^12            10^18
quintillion      10^18            10^30
sextillion       10^21            10^36
septillion       10^24            10^42
octillion        10^27            10^48
nonillion        10^30            10^54
decillion        10^33            10^60
undecillion      10^36            10^66
duodecillion     10^39            10^72
tredecillion     10^42            10^78
quatuordecillion 10^45            10^84
quindecillion    10^48            10^90
sexdecillion     10^51            10^96
septendecillion  10^54            10^102
octodecillion    10^57            10^108
novemdecillion   10^60            10^114
vigintillion     10^63            10^120
----------------------------------------
googol           10^100
googolplex       10^googol = 10^(10^100)
----------------------------------------```

### SI Prefixes

 Number Prefix Symbol 10 1 deka- da 10 2 hecto- h 10 3 kilo- k 10 6 mega- M 10 9 giga- G 10 12 tera- T 10 15 peta- P 10 18 exa- E 10 21 zeta- Z 10 24 yotta- Y
 Number Prefix Symbol 10 -1 deci- d 10 -2 centi- c 10 -3 milli- m 10 -6 micro- u (greek mu) 10 -9 nano- n 10 -12 pico- p 10 -15 femto- f 10 -18 atto- a 10 -21 zepto- z 10 -24 yocto- y

### Roman Numerals

 I=1 V=5 X=10 L=50 C=100 D=500 M=1 000 _V=5 000 _X=10 000 _L=50 000 _C = 100 000 _D=500 000 _M=1 000 000
Examples:
 ```1 = I 2 = II 3 = III 4 = IV 5 = V 6 = VI 7 = VII 8 = VIII 9 = IX 10 = X``` ```11 = XI 12 = XII 13 = XIII 14 = XIV 15 = XV 16 = XVI 17 = XVII 18 = XVIII 19 = XIX 20 = XX 21 = XXI``` ```25 = XXV 30 = XXX 40 = XL 49 = XLIX 50 = L 51 = LI 60 = LX 70 = LXX 80 = LXXX 90 = XC 99 = XCIX ```

### Number Base Systems

```decimal binary ternary oct hex
0      0       0   0   0
1      1       1   1   1
2     10       2   2   2
3     11      10   3   3
4    100      11   4   4
5    101      12   5   5
6    110      20   6   6
7    111      21   7   7
8   1000      22  10   8
9   1001     100  11   9
10   1010     101  12   A
11   1011     102  13   B
12   1100     110  14   C
13   1101     111  15   D
14   1110     112  16   E
15   1111     120  17   F
16  10000     121  20  10
17  10001     122  21  11
18  10010     200  22  12
19  10011     201  23  13
20  10100     202  24  14```
Java Base Conversion Calculator (This converts non-integer values & negative bases too!)
(For Microsoft 2+/Netscape 2+/Javascript web browsers only)
 from base to base value to convert
Caution: due to CPU restrictions, some rounding has been known to occur for numbers spanning greater than 12 base10 digits, 13 hexadecimal digits or 52 binary digits. Just like a regular calculator, rounding can occur.