Unit of Mass in Metric System
| 1,000,000,000,000,000 | 1x1015 | petagram (Pg) | quadrillion | ||
| 1,000,000,000,000 | (Million Metric Tons or Megatonnes) | 1x1012 | teragram (Tg) | trillion | |
| 1,000,000,000 | (Thousand Metric Tons) | 1x109 | gigagram (Gg) | billion | |
| 1,000,000 | (Metric Ton) | 1x106 | megagram (Mg) | million | |
| 1,000 | 1x103 | kilogram (Kg) | thousand | ||
| 100 | 1x102 | hectogram (Hg) | hundred | ||
| 10 | 1x101 | decagram (Dg) | ten | ||
| 1 | gram | ||||
| 0.1 | 10-1 | decigram (dg) | tenth | ||
| 0.01 | 10-2 | centigram (cg) | hundredth | ||
| 0.001 | 10-3 | milligram (mg) | thousandth | ||
| 0.000,001 | 10-6 | microgram (ยตg) | millionth | ||
| 0.000,000,001 | 10-9 | nanogram (ng) | billionth | ||
| 0.000,000,000,001 | 10-12 | picogram (pg) | trillionth | ||
| 0.000,000,000,000,001 | 10-15 | femtogram (fp) | quadrillionth |