A single batch based on the recipe with bone that I use to make cat food makes a wee bit over 2 kg (4.4 pounds) of food. How long that lasts is entirely dependent on your cat.
In truth, I usually make about a triple-sized batch. At least.
If you're using the super-nifty pint-sized can-or-freeze jars to store the food you make (see Supplies page too), each jar holds about 400 grams of food. I know because I just weighed it out this morning and I am so wicked proud of myself for remembering to do that that I'm actually blogging it.
That means that if you make a single-sized batch (2 kg), you will need about five or six jars to store the food.
Those six-ish jars should feed one average healthy adult cat for about 12-14 days. Please understand that every cat's appetite, needs, activity level, body size, and moods are different so your mileage may vary. A petite 7 pound cat will require less food (most likely) than an 18-pound male Maine Coon cat. And even body size isn't the only indicator for judging how much a cat will need to eat each day. Hop on over to the the FAQ page for more on how much to feed your cat. (Spoiler alert: I really don't know, but I can give you a ballpark guesstimate.)