If you want to know at all times how much your voting power is worth and how long it will take to regenerate,
Steem Now is the application you are looking for. All you have to do is access this link, enter your Steemit username, and ...

Ready! You can see your current voting power (Voting power) or that of any other user. It also shows you how long it will take to regenerate 100%.

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Steem Now besides showing you your voting power, it shows you things like:

• Also, you can show how much your vote is worth depending on the voting power you have, as you can see on the left in the following image:
  
  
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• In the middle it tells you what you have gained in the last 2 days, through curation (voting to others) and author (posting posts or comments).

• It shows you the amount of STEEM POWER that you currently have.

• You can see who has voted and with what percentage they have done so, in your posts and comments.

• It also shows you the last posts you published, with their respective potential payments.

• Finally this option is not important but it makes it more attractive. It is able to change the theme, that is, change the appearance of the page to a darker one. At the moment it has only 2, the "Light" and the "Dark".

It is a complete application, I use it to see my voting power and but it has many more applications as you have been able to verify.