Orders of magnitude (density)
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| Orders of magnitude |
|---|
| area |
| angular velocity |
| currency |
| data |
| density |
| energy |
| frequency |
| length |
| mass |
| numbers |
| power |
| pressure |
| specific heat capacity |
| speed |
| temperature |
| time |
| volume |
| Conversion of units |
| physical unit |
| SI |
| SI base unit |
| SI derived unit |
| SI prefix |
| Planck units |
| 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 |
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