[Wolffink]

Don't think 3:1 or some such thing first. You mention you don't know how to add it up.

Think: "Can I scoop?"

And "Am I drawing to the nuts?"

If the answer is no, and you're playing pot limit, and the bet is of any significance, doesn't matter what odds you're getting. The way you boil a frog is you boil it slowly. You might be getting 3:1 on the river too and lose most of your stack.

In this hand, you only have nut low draw. You're talking about getting a draw to a diamond draw when there's a pair on the board. This is not good. Not good at all. There are many hands that can beat you. You have no high and on the turn you still have no low. Even if you do get the low, you may be quartered.