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Date: Sun, 10 May 2015 22:56:30 +0100
From: Rob Golding <rob.golding@astutium.com>
To: Bitcoin Development <bitcoin-development@lists.sourceforge.net>
Organization: www.astutium.com
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Subject: Re: [Bitcoin-development] Proposed alternatives to the 20MB step
 function
Precedence: list

> How much will that cost me?
> The network is hashing at 310PetaHash/sec right now.
> Takes 600 seconds to find a block, so 186,000PH per block
> 186,000 * 0.00038 = 70 extra PH
> 
> If it takes 186,000 PH to find a block, and a block is worth 25.13 BTC
> (reward plus fees), that 70 PH costs:
> (25.13 BTC/block / 186,000 PH/block) * 70 PH = 0.00945 BTC
> or at $240 / BTC:  $2.27
> 
> ... so average transaction fee will have to be about ten cents ($2.27
> spread across 23 average-sized transactions) for miners to decide to
> stay at 600K blocks

Surely that's an *extra* $2.27 as you've already included .13BTC 
($31.20) in fees in the calculation ?

Rob