Capsule Size Calculator
Use our capsule size calculator to estimate which empty capsule size you need based on your powder dose and powder density.
Capsule Capacity Chart
| Capsule Size | Volume | Approx. Capacity at Medium Density |
|---|---|---|
| 000 | 1.37 ml | 822 mg |
| 00 | 0.95 ml | 570 mg |
| 0 | 0.68 ml | 408 mg |
| 1 | 0.50 ml | 300 mg |
| 2 | 0.37 ml | 222 mg |
| 3 | 0.30 ml | 180 mg |
| 4 | 0.21 ml | 126 mg |
These figures are estimates. Actual fill weight depends on powder density, moisture, particle size and how tightly the powder is packed.
How to Use the Capsule Size Calculator
This calculator helps estimate the best empty capsule size based on your powder dose and powder density. Different powders fit differently inside capsules, so the same capsule size may hold different milligram amounts depending on the powder.
Which Capsule Size Should I Choose?
Size 000 is the largest common empty capsule size and is useful for larger powder amounts. Size 00 and size 0 are among the most popular capsule sizes for supplements, herbs and powders. Smaller sizes such as 1, 2, 3 and 4 are often used when a lower dose or smaller capsule is preferred.
Shop CAPSI empty capsules in gelatin and HPMC vegetarian options, available in multiple sizes.