(Updated with google docs link toward the bottom)

A few months ago, @skcin wrote up a pretty amazing post about calculating your stake probability under the new version.  
https://steemit.com/gridcoin/@skcin/gridcoin-v8-difficulty-and-what-it-tells-you
Being a math nut, I immediately dug into it to see how long it would take me to stake back when I had 200 GRC.  Now that I have 1000, I looked at it again, and I took all the math and put it into a spreadsheet.  It appears that the only items from skcin's list that are subject to change are the difficulty and the stake weight, so these are the only two fields I have set up for user input.

Here's a screenshot of the main page.  Enter in the difficulty and how many coins you have, and it'll do all the work for you.
![display](https://steemitimages.com/DQmQW9vWyELJa3dAxyjLNrjvo45tWHH99Ez5wqEYF8LqxJa/image.png)

On this page is all the math behind the scenes.
![math bits](https://steemitimages.com/DQmR5Prx5o1VX5LGkaD5bBD8VeZk8UrxhihrcPmd7N7KnBR/image.png)

As you can see here, I have a pretty good chance of staking in a month and should definitely stake after about 2.6 months.  I think I'll stay pool mining for a little while longer then.

You can check out the spreadsheet here:
* EDIT: Here it is on Google Docs: [GRC v8 Stake Calculator](https://docs.google.com/spreadsheets/d/1UD-tB3uaq3gj2sxK7fVYvxhtiatbOdaan-vGM07WA9E/edit?usp=sharing)
* Open Office .ods version: [GRC stake math.ods](https://www.dropbox.com/s/pz226k2o4ong5pf/GRC%20stake%20math.ods?dl=0)
* Microsoft Office .xls version:  [GRC stake math.xls](https://www.dropbox.com/s/j1luc9awp5ert34/GRC%20stake%20math.xls?dl=0)

My only concern is how drastically different it is from the info given within the wallet.  On the day that I wrote up this spreadsheet, my wallet said I should stake within 11 days instead of the 1-2 months that the spreadsheet stated.  Not sure why there is such big discrepancy though.

Anyway, give it a look and let me know what you think.