Orders of magnitude (density)

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Orders of magnitude
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density
energy
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Conversion of units
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SI
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Planck units

List of orders of magnitude for density

Factor	Multiple	Value	Item
10-27	1 yoctogram (yg)/m3	1 × 10-27 kg/m3	very approximate density of the universe
10-24	1 zeptogram (zg)/m3
10-22	100 zg/m3	1 × 10-22 kg/m3	probable lowest observed density of space in galactic spiral arm (1 hydrogen atom every 16 cubic centimetres)
10-21	1 attogram (ag)/m3
10-20
10-19
10-18	1 femtogram (fg)/m3	1 × 10-18 kg/m3	observed density of space in core of galaxy (600 hydrogen atoms in every cubic centimetre)
10-17	10 fg/m3	1 × 10-17 kg/m3	best vacuum from a laboratory (1.3 nPa)
10-16
10-15	1 picogram (pg)/m3
10-14
10-13
10-12	1 nanogram (ng)/m3
10-11
10-10
10-9	1 microgram (μg)/m3
10-8
10-7
10-6	1 milligram (mg)/m3
10-5		1.34 × 10-5 kg/m3	Earth atmosphere at 82 kilometre altitude
10-4		1.09 × 10-4 kg/m3	Earth atmosphere at 68 kilometre altitude
10-3	1 gram (g)/m3	1 gram (g)/m3	vacuum from a mechanical vacuum pump
10-2	10 gram (g)/m3	1.35 × 10-2 kg/m3	Earth atmosphere at 32 kilometre altitude
		90 g/m3	hydrogen gas, the least dense substance at STP
10-1		1.66 × 10-2	Earth atmosphere at 16 kilometre altitude
100	1 kilogram (kg)/m3	1.48 kg/m3	Earth atmosphere at sea level
		3 kg/m3	typical density of aerogel
101
102		945 kg/m3	average human body after inhalation
		985 kg/m3	average human body
103	1 megagram (Mg)/m3 1 tonne (t)/m3	1000 kg/m3	liquid water at 4°C
		1025 kg/m3	average human body after exhalation
104	10000 kg/m3	10490 kg/m3	silver
		11340 kg/m3	lead
		22650 kg/m3	iridium, the densest known substance at STP
105		150,000 kg/m3	core of the Sun
106	1 gigagram (Gg)/m3
107
108
109	1 teragram (Tg)/m3		white dwarf
1010
1011
1012	1 petagram (Pg)/m3
1013	1 × 1013 kg/m3	2 × 1013 kg/m3	Universe at end of electroweak epoch (approximately)
1014
1015	1 exagram (Eg)/m3
1016
1017		2 × 1017 kg/m3	atomic nuclei and neutron stars
1018	1 zettagram (Zm)/m3
1019
1020
1021	1 yottagram (Yg)/m3
…
1096		5.1 × 1096 kg/m3	Planck density

[edit] External links

• Conversion Calculator for Units of Density