Aligni supports SI Prefixes for value entry. When you enter a value for a part, two items are stored along with the part:

1. Value – This is a floating point representation of the value. This storage is helpful for performing searches based on value and tolerance. (i.e. find all parts within 10% of value 4.7k)
2. Value Text – This is the actual text that is entered. This helps resolve the ambiguity between what a human likes to see and what the floating point value is. For example, “10n” and “0.01 u” are equivalent values for the same capacitor, but some people prefer to see it represented as the latter rather than the former. Aligni stores text the way you enter it for this reason.

Supported SI Prefixes

10n	Prefix	Symbol	Decimal equivalent
1024	yotta	Y	1 000 000 000 000 000 000 000 000
1021	zetta	Z	1 000 000 000 000 000 000 000
1018	exa	E	1 000 000 000 000 000 000
1015	peta	P	1 000 000 000 000 000
1012	tera	T	1 000 000 000 000
109	giga	G	1 000 000 000
106	mega	M	1 000 000
103	kilo	k	1 000
102	hecto	h	100
101	deca, deka	da	10
100	(none)	(none)	1
10−1	deci	d	0.1
10−2	centi	c	0.01
10−3	milli	m	0.001
10−6	micro	µ (u)	0.000 001
10−9	nano	n	0.000 000 001
10−12	pico	p	0.000 000 000 001
10−15	femto	f	0.000 000 000 000 001
10−18	atto	a	0.000 000 000 000 000 001
10−21	zepto	z	0.000 000 000 000 000 000 001
10−24	yocto	y	0.000 000 000 000 000 000 000 001

Supported IEC Standard Prefixes

Name	Symbol	Base 2	Base 10
kibi	Ki	210	= 1,024	> 103
mebi	Mi	220	= 1,048,576	> 106
gibi	Gi	230	= 1,073,741,824	> 109
tebi	Ti	240	= 1,099,511,627,776	> 1012
pebi	Pi	250	= 1,125,899,906,842,624	> 1015
exbi	Ei	260	= 1,152,921,504,606,846,976	> 1018
zebi	Zi	270	= 1,180,591,620,717,411,303,424	> 1021
yobi	Yi	280	= 1,208,925,819,614,629,174,706,176	> 1024