Orders of magnitude (density)
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| Decade of Density | Density using SI prefixes | Density of Item | Item |
|---|---|---|---|
| 10-27 kg/m3 | 1 yoctogram (yg)/m3 | 1 × 10-27 kg/m3 | very approximate density of universe |
| 10-24 kg/m3 | 1 zeptogram (zg)/m3 | ||
| 10-22 kg/m3 | 100 zg/m3 | 1 × 10-22 kg/m3 | probable lowest observed density of space in galactic spiral arm |
| 10-21 kg/m3 | 1 attogram (ag)/m3 | ||
| 10-20 kg/m3 | |||
| 10-19 kg/m3 | |||
| 10-18 kg/m3 | 1 femtogram (fg)/m3 | 1 × 10-18 kg/m3 | observed density of space in core of galaxy |
| 10-17 kg/m3 | 10 fg/m3 | 1 × 10-17 kg/m3 | density of best vacuum from a laboratory (1.3 nPa) |
| 10-16 kg/m3 | |||
| 10-15 kg/m3 | 1 picogram (pg)/m3 | ||
| 10-14 kg/m3 | |||
| 10-13 kg/m3 | |||
| 10-12 kg/m3 | 1 nanogram (ng)/m3 | ||
| 10-11 kg/m3 | |||
| 10-10 kg/m3 | |||
| 10-9 kg/m3 | 1 microgram (μg)/m3 | ||
| 10-8 kg/m3 | |||
| 10-7 kg/m3 | |||
| 10-6 kg/m3 | 1 milligram (mg)/m3 | ||
| 10-5 kg/m3 | 1.34 × 10-5 kg/m3 | Earth atmosphere at 82 kilometre altitude | |
| 10-4 kg/m3 | 1.09 × 10-4 kg/m3 | Earth atmosphere at 68 kilometre altitude | |
| 10-3 kg/m3 | 1 gram (g)/m3 | 1 gram (g)/m3 | density of vacuum from a mechanical vacuum pump |
| 10-2 kg/m3 | 10 gram (g)/m3 | 1.35 × 10-2 kg/m3 | Earth atmosphere at 32 kilometre altitude |
| 10-1 kg/m3 | 1.66 × 10-2 kg/m3 | Earth atmosphere at 16 kilometre altitude | |
| 1 kg/m3 | 1 kilogram (kg)/m3 | 1.48 kg/m3 | Earth atmosphere at sea level |
| 101 kg/m3 | |||
| 102 kg/m3 | 945 kg/m3 | average human body after inhalation | |
| 985 kg/m3 | average human body | ||
| 103 kg/m3 | 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 kg/m3 | 10000 kg/m3 | 10490 kg/m3 | density of silver |
| 105 kg/m3 | |||
| 106 kg/m3 | 1 gigagram (Gg)/m3 | ||
| 107 kg/m3 | |||
| 108 kg/m3 | |||
| 109 kg/m3 | 1 teragram (Tg)/m3 | White dwarf | |
| 1010 kg/m3 | |||
| 1011 kg/m3 | |||
| 1012 kg/m3 | 1 petagram (Pg)/m3 | ||
| 1013 kg/m3 | 1 × 1013 kg/m3 | 2 × 1013 kg/m3 | Universe at end of Electroweak Epoch (approximately) |
| 1014 kg/m3 | |||
| 1015 kg/m3 | 1 exagram (Eg)/m3 | ||
| 1016 kg/m3 | |||
| 1017 kg/m3 | |||
| 1018 kg/m3 | 1 zettagram (Zm)/m3 | neutron star (approximately) | |
| 1019 kg/m3 | |||
| 1020 kg/m3 | |||
| 1021 kg/m3 | 1 yottagram (Yg)/m3 |
