The amount of powder that fits inside an empty capsule depends on:
- capsule size
- powder density
- particle size
- powder compression
Larger capsules can hold more powder, while smaller capsules are easier to swallow.
This guide explains how many milligrams typically fit inside each capsule size.
Capsule mg Capacity Chart
| Capsule Size | Approximate Volume | Approximate Capacity* |
|---|---|---|
| 000 | 1.37 ml | 700–1400 mg |
| 00 | 0.95 ml | 500–950 mg |
| 0 | 0.68 ml | 300–700 mg |
| 1 | 0.50 ml | 250–500 mg |
| 2 | 0.37 ml | 180–370 mg |
| 3 | 0.30 ml | 150–300 mg |
| 4 | 0.21 ml | 100–210 mg |
*Approximate capacities vary depending on powder density.
Why Capsule Capacity Varies
Capsule capacity is based on the density of the powder being used.
For example:
- light fluffy powders weigh less
- dense compact powders weigh more
This means the same capsule may hold:
- 400mg of one powder
- 900mg of another powder
even though the capsule size is identical.
Powder Density and Capsule Filling
Powder density is usually measured in:
g/ml
Higher density powders weigh more inside the same capsule volume.
Example
A size 00 capsule may hold approximately:
- 500mg of a light herbal powder
- 700mg of a medium-density supplement
- 950mg of a dense mineral powder
How Many mg Fit in a Size 000 Capsule?
Size 000 capsules are the largest commonly available capsule size.
Typical capacity:
- 700mg–1400mg
Common uses:
- large herbal doses
- mushroom powders
- protein supplements
How Many mg Fit in a Size 00 Capsule?
Size 00 capsules are one of the most popular capsule sizes.
Typical capacity:
- 500mg–950mg
Common uses:
- supplements
- vitamins
- herbal powders
How Many mg Fit in a Size 0 Capsule?
Size 0 capsules offer a good balance between capacity and ease of swallowing.
Typical capacity:
- 300mg–700mg
Common uses:
- daily supplements
- amino acids
- nutritional powders
How Many mg Fit in Smaller Capsules?
Size 1
Approximate capacity:
- 250mg–500mg
Size 2
Approximate capacity:
- 180mg–370mg
Size 3
Approximate capacity:
- 150mg–300mg
Size 4
Approximate capacity:
- 100mg–210mg
Smaller capsules are commonly used for:
- concentrated ingredients
- low-dose supplements
- easier swallowing
Capsule Size vs Ease of Swallowing
Larger capsules:
- hold more powder
- reduce number of capsules needed
Smaller capsules:
- are easier to swallow
- better for sensitive users
The best capsule size depends on your dosage and preference.
Gelatin vs HPMC Capsule Capacity
Both gelatin and HPMC capsules generally have similar capacities.
Gelatin Capsules
- traditional capsule material
- smooth texture
- widely used
HPMC Capsules
- vegetarian and vegan friendly
- plant-based
- suitable for clean-label supplements
How to Estimate Capsule Capacity
To estimate how much powder fits inside a capsule:
- Determine your powder density
- Check the capsule volume
- Estimate fill weight based on density
You can use our:
- Powder Density Calculator
- Capsule Size Calculator
- Capsule Capacity Calculator
for more accurate estimates.
Frequently Asked Questions
How many mg fit in a size 00 capsule?
Typically between 500mg and 950mg depending on powder density.
What is the largest capsule size?
Size 000 is the largest commonly available standard capsule size.
Which capsule size is best for supplements?
Size 00 and size 0 are among the most commonly used supplement capsule sizes.
Why do capsule capacities vary?
Different powders have different densities, moisture content, and particle sizes.
Are vegetarian capsules available in all sizes?
Yes. HPMC vegetarian capsules are available in most standard capsule sizes.
Related Pages
- Capsule Sizes Explained
- Capsule Size Chart
- Powder Density Calculator
- Capsule Capacity Calculator
- Size 000 Capsule Capacity
- Size 00 Capsule Capacity
- Size 0 Capsule Capacity