I always use this site to check my voting power or my upvote worth, but I always forget to mention the site that I use. I get some people asking, but I forget to mention it so I leave them in the dark. I apologize to anyone who has asked and I've ignored.
Well the site is steemnow.com . All you have to do is go to the site and enter your username. From there it will show you a bunch of information, in this case your Steem Power and upvote worth. I found out the other day that you can actually click on the little calculator that's circled in the screenshot. So as you can see by my SP my upvote worth is 0.33. I hope this helps someone.