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The Metric System of Measurements uses the mass units: gram (g), kilogram (kg) and tonne (t).
| 1000 g = 1 kg |
| 1000 kg = 1 tonne |
Adding prefixes of the International System of Units (SI) allows to express weight as multiples or fractions of 1 gram:
| 1 gigatonne | (Gt) | =1 000 000 000 000 000 g |
| 1 megatonne | (Mt) | =1 000 000 000 000 g |
| 1 tonne | (t) | =1 000 000 g |
| 1 kilogram | (kg) | =1 000 g |
| 1 gram | (g) | =1 g |
| 1 milligram | (mg) | =0.001 g |
| 1 microgram | (µg) | =0.000 001 g |
| 1 nanogram | (ng) | =0.000 000 001 g |
| 1 picogram | (pg) | =0.000 000 000 001g |
Imperial and US weight units can also be expressed as metric units:
| Metric units | ||
| 1 US ton | (ton) | =0.907 tonne |
| 1 UK ton | (ton) | =1.016 tonne |
| 1 lb | (pound) | =453.59 g |
| 1 oz | (ounce) | =28.35g |
Further information on the International System of Units (SI) is provided by
the International Bureau of Weights and Measures (BIPM)
www.bipm.org/en/si/
Deutsch: Massen-/Gewichtseinheiten
Español: Unidades de Masa (peso)
Français: Unités de masse (poids)
Nederlands: Massa (gewicht) Eenheden
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