Size 1 capsules are a popular capsule size for supplements, vitamins, herbal powders, and nutritional formulations.
They offer a good balance between:
- powder capacity
- ease of swallowing
- practical daily use
This guide explains the approximate volume, dimensions, and powder capacity of size 1 empty capsules.
Size 1 Capsule Volume
The approximate internal volume of a size 1 capsule is:
0.50 ml
This means size 1 capsules can hold a moderate amount of powder while remaining relatively easy to swallow.
How Many mg Fit in a Size 1 Capsule?
The approximate powder capacity of a size 1 capsule is:
| Powder Type | Approximate Capacity |
|---|---|
| Light powders | 250–300 mg |
| Medium density powders | 350–450 mg |
| Dense powders | 500 mg |
Actual capacity depends on:
- powder density
- particle size
- moisture content
- compression
Size 1 Capsule Dimensions
| Measurement | Approximate Size |
|---|---|
| Length | 19.0 mm |
| Diameter | 6.7 mm |
| Volume | 0.50 ml |
Size 1 capsules are noticeably smaller than:
- size 000
- size 00
- size 0
making them easier for many people to swallow.
What Are Size 1 Capsules Used For?
Size 1 capsules are commonly used for:
- daily supplements
- vitamins
- amino acids
- herbal powders
- moderate dose formulations
They are often chosen when:
- a medium capsule size is preferred
- swallowing comfort is important
- doses are not excessively large
Size 1 Capsule Capacity by Powder Density
Different powders can produce very different fill weights inside the same capsule.
Low Density Powders
Examples:
- mushroom powders
- fluffy herbal powders
- some plant extracts
Approximate fill:
- 250–300 mg
Medium Density Powders
Examples:
- vitamins
- nutritional powders
- general supplements
Approximate fill:
- 350–450 mg
High Density Powders
Examples:
- minerals
- certain amino acids
- dense synthetic powders
Approximate fill:
- up to 500 mg
Size 1 vs Other Capsule Sizes
| Capsule Size | Approximate Capacity |
|---|---|
| 000 | 700–1400 mg |
| 00 | 500–950 mg |
| 0 | 300–700 mg |
| 1 | 250–500 mg |
| 2 | 180–370 mg |
| 3 | 150–300 mg |
| 4 | 100–210 mg |
Size 1 capsules are considered:
- medium-small capsules
- suitable for moderate doses
- easier to swallow than larger capsules
Are Size 1 Capsules Easy to Swallow?
Yes. Size 1 capsules are generally considered easier to swallow than:
- size 000
- size 00
- size 0
This makes them a popular choice for:
- everyday supplements
- sensitive users
- moderate dosages
Gelatin vs HPMC Size 1 Capsules
Size 1 capsules are available in both:
- gelatin capsules
- HPMC vegetarian capsules
Gelatin Capsules
- traditional material
- smooth texture
- widely used
HPMC Capsules
- vegetarian and vegan friendly
- plant-based
- suitable for clean-label supplements
Both types have similar internal volumes and capacities.
Choosing Size 1 Capsules
Size 1 capsules may be suitable if you want:
- moderate powder capacity
- improved swallowing comfort
- smaller capsules than size 0 or 00
- balanced daily dosage options
If your formulation requires larger doses, you may prefer:
- size 0
- size 00
- size 000
Frequently Asked Questions
How many mg fit in a size 1 capsule?
Typically around 250–500 mg depending on powder density.
What is the volume of a size 1 capsule?
A size 1 capsule has an approximate volume of 0.50 ml.
Are size 1 capsules easy to swallow?
Yes. Size 1 capsules are smaller than many standard supplement capsule sizes and are generally easier to swallow.
Are vegetarian size 1 capsules available?
Yes. HPMC vegetarian size 1 capsules are widely available.
What are size 1 capsules commonly used for?
They are commonly used for vitamins, supplements, herbal powders, and moderate-dose formulations.
Related Pages
- Capsule Sizes Explained
- Capsule Size Chart
- Capsule Volume Chart
- Capsule Capacity Calculator
- Powder Density Calculator
- How Many mg Fit in a Capsule
- Size 000 Capsule Capacity
- Size 00 Capsule Capacity
- Size 0 Capsule Capacity
- Size 2 Capsule Capacity