Your calculation is WAY off, which the bizarrely high end result should have made obvious. Multiplying by 3600 is where you go wrong.

65,217kW is the energy usage. Providing that for an hour takes 65,217kWh - not multiplied by anything.

So that's $6,521 per hour, $156,521 per day.

great thanks, 100 times cheaper than the forbes article.

ps it wasn't obvious at all, that's why i wrote "even more wacky" as mark of how solid i thought the figures were.

3600*7 = 25200 transactions for $6521.

they'd really want to see about increasing the block size.

The block size is not the limit here; the protocol aims for one block every 10 minutes so that users don't have to wait too long to get a transaction confirmed.

Cost per transaction would go down drastically with increased usage.