The capacity of a "00" capsule depends on the density of the substance you're filling it with. Typically, a standard "00" capsule can hold:

• 400-500 mg of powdered material, depending on its density and how tightly it's packed.

Detailed Breakdown:

• For loose powders (with a lower density like herbs or some vitamins), a "00" capsule will usually hold around 400 mg.
• For denser powders (like certain pharmaceutical powders), a "00" capsule can hold closer to 500 mg.

If you're working with specific materials, like finely ground powders or granules, the weight might vary slightly, but this gives you a general idea of how much you can fit in a "00" capsule.