Average time for 6 confirmations?

[NUFCrichard]

Even though guides and blockchain says average time is 30 minutes for 3 confirmations, I feel it is around 1.5-2 Hours for 6 confirmations, from what I have experienced.

The goal blocktime of bitcoin is 10 minutes.  For 6 blocks to be solved, it will take 60 minutes if the overall mining power is the same as when the last difficulty change happened.  Usually it has slightly increased, so it takes slightly less than one hour - by design.

[cparsley]

Your total for 6 can be on the lucky side 30-40 mins, on the unlucky side up to 4 hours... but since your physically mailing a physical product, that shouldn't be a concern as don't put the book(s) in the post (or FedEx/UPS/DHL) etc until you sure the coins are in/valid.

[twister]

I think 3 confirmations are more than enough unless the price of purchase is more than 500 BTC. And normally it takes up-to 40-60 minutes.

[Webnet]

for small amounts 1 confirm is ok, for larger amounts 3 confirm. 6confirm would take around 1 - 1.4 hours