Empty Gelatin Capsule Sizing Reference
Use our size chart to compare specifications and capacity for Size 3, Size 4, and Size 5 empty gelatin capsule shells. These high-quality, clear, and colored shells are designed for use with manual capsule filling machines and are shipped quickly from our US location.
| Capsule Size | Volume (mL) | Locked Length (mm) | External Diameter (mm) | Typical Powder Capacity* |
|---|---|---|---|---|
| Size 3 | ~0.30 mL | 15.7 mm | 5.82 mm | ~150 – 300 mg |
| Size 4 | ~0.21 mL | 14.3 mm | 5.32 mm | ~100 – 200 mg |
| Size 5 | ~0.13 mL | 11.1 mm | 4.91 mm | ~60 – 130 mg |
*Note: Actual capacity depends entirely on powder density (0.6 g/mL to 1.0 g/mL). For exact capacity, a powder density test is recommended.