Bitcoin transaction volume

[proton]

Question:

What would be the volume of transactions done in bitcoin?  preferably, in USD $ equivalent.   Is there a way to measure or guess this number?

There are some figures quoted but these include the transactions for speculating/investing purposes.   I am looking for specifically for those transactions made in bitcoin for purchasing goods or services.

As you can surmise, this figure may be a good base to measure bitcoin’s adoption rate.

[LiteCoinGuy]

do you search for this?

http://blockchain.info/de/charts

[proton]

I have seen the blockchain graphs.  They are for all transactions, not just for those made for commerce.

[zimmah]

it's impossable to tell

[kdrop22]

Bitpay made 100 Million in merchant transactions this year. I would assume the total business transaction to be about 10 times that at 1 Billion.
However, if you look at the chart in blockchain.info, you will find that the volume of transactions is 100 times that. I assume there are aare lot of transactions like online gambling etc..., which have a very high velocity of money and do not contribute in meaningful way to model the value of the currency.