Pack Size Advice Copypasta

What size pack should I get?
Will pack X work for me?
Can I fit my current gear into X liters?
Do the following:

1. Assemble all the gear and food you plan to carry.
2. Put it in a cardboard box.
3. Measure Width, Length and Height of the stuff in the box.
4. Multiply Width x Length x Height to get Volume.
5. Convert Volume to liters. If you measured in inches, divide by 61.
6. Weigh what you’re carrying.
7. Over 20 lbs you probably want a framed pack + hip belt. Over 25 lbs you definitely do.
8. If possible try on weighted packs, exact fit and comfort limits vary per person.
9. Make your decision.