UN Framework Convention on Climate Change – GHG FAQs

What global warming potential (GWP) values do Parties use when they report their GHG inventory data?
A table with the values is provided here.

What are the most widely used units of measurement for GHG emissions and what are their conversion factors?
The most widely used units and conversion factors are:
10⁶ g = 1000 kg = 1 tonne = 1 Mg
10⁹ g = 1 Gg = 1 kt
10¹² g = 1 Tg = 1 Mt
10¹⁵ g = 1 Pg = 1 Gt

Source: GHG FAQs