By the ALL-IN Capsule team.
Quick answer
Size 00 is the most common choice for home supplements. Size 0 is easier to swallow. Size 000 holds the most and suits bulky herbs. Size 1 is for smaller doses.
Capsule size chart
| Size | Length (closed) | Volume | Powder per capsule* |
|---|---|---|---|
| 000 | 26.1 mm | 1.37 ml | about 800–1,600 mg |
| 00 | 23.4 mm | 0.90 ml | about 600–1,100 mg |
| 0 | 21.6 mm | 0.68 ml | about 400–800 mg |
| 1 | 19.4 mm | 0.48 ml | about 300–600 mg |
*Depends on how dense your powder is and how firmly you tamp it. The ranges match the size chart on our product pages.
How to work out your dose
- Weigh 10 empty capsules and note the weight.
- Fill 10 capsules with your powder and weigh them.
- Subtract and divide by 10. That is your fill per capsule.
- Divide your daily dose by that number to see how many capsules you need.
Example: you want 1,500 mg a day and one size 00 capsule holds 750 mg of your powder. Take 2 capsules a day.
Which size should you choose?
- Choose 000 if your dose is over 1,000 mg and you don't mind a large capsule.
- Choose 00 for most daily supplements. It's the best balance of dose and size.
- Choose 0 if 00 feels too big to swallow.
- Choose 1 for low-dose powders or if you prefer small capsules.
Size 0 vs 00: the most common question
A size 00 capsule holds about a third more than a size 0 (0.90 ml vs 0.68 ml) and is 1.8 mm longer. If you take 2 or more size 0 capsules per dose, switching to 00 can mean fewer capsules a day.
One machine per size
Manual capsule filling machines are made for one capsule size. Pick your size first, then the matching machine:
- Capsule Filling Machine Size 000
- Capsule Filling Machine Size 00
- Capsule Filling Machine Size 0
- Capsule Filling Machine Size 1
Not sure which machine? Read our capsule filling machine buyer's guide.
FAQ
Is size 00 bigger than size 0?
Yes. The more zeros, the bigger the capsule.
Can I use size 0 capsules in a size 00 machine?
No. The holes are made for one size, so smaller capsules won't stay in place.
Gelatin or vegetarian?
Both come in all four sizes and both work in ALL-IN machines.