36 minutes for each vote, but if you vote all at once it could take days to get back up to 100% voting power I actually did this and went over how it works a little when I first joined Steemit..

https://steemit.com/money/@stealthtrader/don-t-waste-your-steem-power-like-i-did

But no your upvote only counts for what it counts for.. if you have 1 MV and $600 worth upvoting power like me that's what I have and when I'm at 100% it's .03 cents..