If the question is, what bitterness level will I end up with with my planned schedule, then you need software. I downloaded free software called BrewMate. You enter the brew length (23l), the grain bill, and the hop bill, including hop timing. You must edit the hop Alpha % to match that shown on the hop packs you bought, and tell it if the hops are leaf or pellet. The software then tells you the expected bitterness level and the colour. Often recipes quote the target bitterness (EBU or IBU), and it is very rare that just following the recipe hop weight will get you the same EBU. This is because hop Alpha % varies from one batch to the next, and certainly one year to the next. So to get close to the recipe intended EBU, you must use the software, adjusting the hop weights to hit the stated EBU target, and not just follow the recipe hop weight. Good recipes should also give you the timings for hop additions. Free recipes can be found everywhere on line.
Expect an EBU centre-range of about 28 (smooth ale) to 43 (Guiness). When I make up my own recipe, I aim for about 33 EBU, but that's personal preference.
