Flitch. You get FP packages put in your inventory when you get the rewards from GB contributions, and when you get 5-FP packages from Recurring Quests. The Forge Point Package is the same as the Forge Points in the Inventory. Forge Points will get placed into inventory (Forge Point Package) after leveling up a Great Building.
So, at level 10, Himeji awards 5 * 0.25 * (0.25*10 + 0.12*50 + 0.05*200) = 23.125 FP per day on average! Wow! You only need to spend 3856 FP to get to this level - for Cape Canaperal for example, you need to spend 8555 FP to get 23 FP per day! So yeah, don't overlook the Castle Himeji when it comes to increase your FP output! Calculator. FoE - Förderrechner Legendäre Bauwerke In den Spalten Reihenfolge und FP stehen alle notwendigen Einzahlungsdaten (wer und wieviel) und a formula to calculate amount of FP's needed to secure a spot would be more usefull now that Inno shows us rewards in our GB's. That's easy: FP's to lock a slot = Math.Ceil [ (Total Level Cost) - (Total Current Contributions) + (Contributions in the Slot to Beat) - (Your Contributions) ] / 2. e.g. Cape, current level 64, 1 FPs contributions

What I'm looking to know: total guaranteed generated FP (so this doesn't include the 24 we auto-generate per day, TBG hits, GBG rewards, Crow's Nest extra 12, sniping, etc.), the age you're currently in, and how long you've been playing. I've been playing for 18 months, I'm in Contemporary Era, and I generate 627 FP. Here's a screenshot of my city.

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forge of empires fp calculator