How to work out APR on credit card from monthly interest

[eklipze]

I'm getting 1.667% interest each month

What is the math to work out the related APR. ?

Please

[Kryten]

21.94% I believe!

[Bapapapa]

http://www.stoozing.com/mon2yr.htm

[eklipze]

Thanks all. Been chucking my credit cards into a snowballing spreadsheet and the figures are all off.

Needed the above to give the the APR for each card but now I'm presuming the following

(Interest chaged per month in £ x 100)/ monthly % (should)= last balance - last payment, but before interest goes on

What am I missing please ?

[farmroad38]

Are they charging you interest on each transaction from the date it was applied to the account, rather than the statement date?

[chrisjm]

dont they legally have to write on the statement what % you have signed up to. they do on mine anyway