Question for you ladies

Sarah • Can`t wait for baby #1. Can`t wait to have our own little family
Just wondering.....when people refer to how many days past ovulation they are, do they mean how many days past their positive OPK? Because I know ovulation occurs 12-36 hours after a positive OPK but for example, when I say I am 10dpo I mean 10 days past my positive OPK. Do people add an extra day or what?