The estimates below assume a 1:16 brew ratio and a 12 fl-oz cup size. This is the same as a coffee shop Tall size. Please keep in mind that stated capacity for a drip brewer is often, but not always, based on a 5 or 6 fl-oz cup, so it's an entirely different animal.
Bag yields…
12oz bag ≈ 15 cups (12 fl-oz)
2lb bag ≈ 41 cups (12 fl-oz)
5lb bag ≈ 102 cups (12 fl-oz)
If you drink...
1 cup/day ≈ [ 12oz / 2 wk ]
2 cups/day ≈ [ 2x12oz / 2wk ] OR [ 2lb / 3wk ]
3 cups/day ≈ [ 2lb / 2wk ] OR [ 5lb / 4wk ]
5 cups/day ≈ [ 2lb / 1wk ] OR [ 5lb / 3wk ]
7 cups/day ≈ [ 5lb / 2wk ]
10 cups/day ≈ [ 3x5lb / 4wk ]
For Espresso, a normal double-shot requires around 18 grams of coffee.
12oz bag ≈ 18 double-shots
2lb bag ≈ 50 double-shots
5lb bag ≈ 126 double-shots