Approximate Grand Total?

Strategic ICBMs ~ 800 Warheads (Yield 300-500Kt ea.)
Sea-Based ICBMs ~ 1440 Warheads (Yield 300Kt ea.) [SSBNs]
~ 144 Warheads (Yield 200Kt ea.) [Fast Attack]
Additional Weapons ~ 800 bombs ~ (Yields selectable as follows: 0.3, 1.5, 5, 10, 45, 60, 60, 80, 170, and 340 kilotons)

Total? ~ 3,184 Warheads (lowest total yield:640,240 Kilotons, highest possbile yield: 1,072,000 Kilotons, Avg yield per warhead: 538 Kilotons)

Just for your edification, the two weapons that have been deployed in wartime (Little Boy - Hiroshima, and Fat Man - Nagasaki, were 15, and 21 Kilotons respectively).

So I guess I'm wrong...

yep. cuz you didn't read what I wrote. For one, all of those weapons would not be able to be launched because they would either be destroyed on the first strikes, or there would be no command & control systems left to arm and fire them after the first or second strikes. Second, more than 1/3 of what you list as current armament are tactical weapons and most wouldn't be fired in an all out exchange, plus their yields are too small for any long term climate damage.

Plus simply adding up the # of warheads and the yield per class doesn't give you a good picture of total tonnage or even average tonnage. You could still be off by at least 1 standard deviation using that technique, possibly more.

But y'know... thanks for not being a dick about it.

RE: AM - Gore warns on climate change