How big of a blast is a nuke?

How big of a blast is a nuke? Drozdenko said US nukes generally had explosive yields equivalent to about 300 kilotons of TNT, while Russian nukes tended to range from 50 to 100 kilotons to 500 to 800 kilotons, though each country has more powerful nuclear weapons.

Drozdenko said US nukes generally had explosive yields equivalent to about 300 kilotons of TNT, while Russian nukes tended to range from 50 to 100 kilotons to 500 to 800 kilotons, though each country has more powerful nuclear weapons.