Number Notation

Hierarchy of Numbers

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

[text:name]	[text:American-French]	[text:English-German]
[text:million]	10^6	10^6
[text:billion]	10^9	10^12
[text:trillion]	10^12	10^18
[text:quadrillion]	10^15	10^24
[text:quintillion]	10^18	10^30
[text:sextillion]	10^21	10^36
[text:septillion]	10^24	10^42
[text:octillion]	10^27	10^48
[text:nonillion]	10^30	10^54
[text:decillion]	10^33	10^60
[text:undecillion]	10^36	10^66
[text:duodecillion]	10^39	10^72
[text:tredecillion]	10^42	10^78
[text:quatuordecillion]	10^45	10^84
[text:quindecillion]	10^48	10^90
[text:sexdecillion]	10^51	10^96
[text:septendecillion]	10^54	10^102
[text:octodecillion]	10^57	10^108
[text:novemdecillion]	10^60	10^114
[text: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

[text: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

[text: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

[text:Number Base Systems]

[text:decimal]	[text:binary]	[text: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

[text:JavaScript Base Conversion Calculator] ([text:This converts non-integer values & negative bases too!])

[text:from base]	[text:to base]	[text:value to convert]

[text: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.] [text:Just like a regular calculator, rounding can occur.]