Mega-

Mega is a

Common examples of usage

• Megapixel: 1 million pixels
  in a digital camera
• One megatonne of
  petajoules and is the approximate energy released on igniting one million tonnes of TNT. The unit is often used in measuring the explosive power of nuclear weapons
  .
• Megahertz: frequency of electromagnetic radiation for radio and television broadcasting, GSM, etc. 1 MHz = 1,000,000 Hz
  .
• Megabyte: unit of information equal to one million bytes (SI standard).
• power plants, as well as the power consumption of electric locomotives, data centers
  , and other entities that heavily consume electricity.
• Megadeath: (or megacorpse) is one million human deaths, usually used in reference to projected number of deaths from a
  all-out nuclear warfare
  .

Exponentiation

When units occur in exponentiation, such as in square and cubic forms, any multiples-prefix is considered part of the unit, and thus included in the exponentiation.

• 1 Mm² means one square
  square of 1000000m by 1000000m or 10¹²m², and not 1000000square metres
  (10⁶ m²).
• 1 Mm³ means one cubic
  megametre or the size of a cube of 1000000m by 1000000m by 1000000m or 10¹⁸ m³, and not 1000000cubic metres
  (10⁶ m³)

Computing

In some fields of

bit/s

. In the case of 3½-inch floppy disks, sizes were given in megabytes of 1000KB or 1024000 bytes.^[2] The prefix

mebi-

has been suggested as a prefix for 2²⁰ to avoid ambiguity.

SI prefixes

• v
• t
• e

Prefix		Base 10	Decimal	Adoption [nb 1]
Name	Symbol
quetta	Q	1030	1000000000000000000000000000000	2022[3]
ronna	R	1027	1000000000000000000000000000
yotta	Y	1024	1000000000000000000000000	1991
zetta	Z	1021	1000000000000000000000
exa	E	1018	1000000000000000000	1975[4]
peta	P	1015	1000000000000000
tera	T	1012	1000000000000	1960
giga	G	109	1000000000
mega	M	106	1000000	1873
kilo	k	103	1000	1795
hecto	h	102	100
deca	da	101	10
—	—	100	1	—
deci	d	10−1	0.1	1795
centi	c	10−2	0.01
milli	m	10−3	0.001
micro	μ	10−6	0.000001	1873
nano	n	10−9	0.000000001	1960
pico	p	10−12	0.000000000001
femto	f	10−15	0.000000000000001	1964
atto	a	10−18	0.000000000000000001
zepto	z	10−21	0.000000000000000000001	1991
yocto	y	10−24	0.000000000000000000000001
ronto	r	10−27	0.000000000000000000000000001	2022[3]
quecto	q	10−30	0.000000000000000000000000000001
Notes ^ Prefixes adopted before 1960 already existed before SI. The introduction of the CGS system was in 1873.

• Binary prefix
• Mebibyte
• Order of magnitude
• RKM code

• BIPM website