The current nuclear arsenal is over 2000 times greater than all of the munitions used in WWII (including the nuclear weapons dropped on Japan)

https://en.wikipedia.org/wiki/TNT_equivalent

* The total energy of all explosives used in World War Two (including the Hiroshima and Nagasaki bombs) is estimated to have been three megatons of TNT

* The total global nuclear arsenal is about 30,000 nuclear warheads with a destructive capacity of 7,000 megatons or 7 gigatons (7,000 million tons) of TNT