By request from another thread, here is the spreadsheet I use for figuring out what to terraform and how to terraform it.
EDIT:
Here's the same spreadsheet imported to Google Sheets. Not thoroughly tested. Let me know if you encounter any issues.
It gives optimal target atmosphere conditions from any given starting conditions (including race parameters), and also shows how long it will take (in "TFIyrs": Terraforming Installation Years) given your current tech level and naval admin bonus. (Note: the input fields for commander bonus are not factored in.)
It also does some aggregating of mineral deposit data for reporting/reviewing purposes. Useful for deciding which bodies to mine next.
The second sheet calculates target water vapor pressure based on your terraforming rate (so that you don't waste time adding too much), and gives ETAs for finishing vapor, finishing other gases, and vapor evaporating.
There may be far more here than you really want, but you can pare it down as you like.
The easiest way to get the data into the spreadsheet is to run a query against the database.
I've included the query on the third sheet if you'd like to do that.
DB Browser for SQLLite is the free tool I use.
Known limitations:
The SQL query returns only the information known to the most recently created player race. If you aren't playing the most recent game you created, you'll need to manually specify the raceid (or gameid) you want in the query.
The query returns names for uncolonized bodies based on my own naming convention.
SYS-X#[M#] where SYS is the first three letters of the system name, X is the star letter, # is the order of the planet from the star, and M# is the order of the moon from the planet.
Examples:
Earth = SOL-A3
Luna = SOL-A3M1
Comets and asteroids are handled similarly, using SYS-Com# or SYS-XAst#.
Note that this only applies to uncolonized bodies. If the body is colonized, the name of the colony is used.
The terraforming calculations do not include the albedo increase for a melting ice sheet. I may add that at some point. If you don't want to wait, you can factor it in. The change is .0015 * Hydro extent (at the point in time that the sheet melts).
The calculations are based on the terraforming model for 1.11. The model will change somewhat in 1.12, specifically the mechanics for anti-greenhouse gases. I'll post an update after 1.12 hits.
The calculation treats all toxic as having a colony cost of 3.0 and no safe level allowed. This simplifies things, but gives you very slightly suboptimal results. You can leave
some amount of toxic gases in the atmosphere to get done terraforming slightly faster.
DISCLAIMER:
This was designed for personal use, so expect it to contain some things that are not self-explanatory.
I'm happy to answer any questions.
And if you find any errors, I would love to know.