Convert from petagram to millier

Unit Definition (petagram)
The petagram is a metric unit of mass equal to 10E15 grams or 1 gigatonne (one billion metric tons). This unit is used in atmospheric science and other scientific contexts where large masses are considered.

Unit Definition (millier)
The millier is a former name for the tonne or metric ton. This name, obsolete now, was used in Britain to avoid confusion with the British long ton.