Size 0 capsules are one of the most popular empty capsule sizes used for supplements, herbs, vitamins, and nutritional powders.

They offer a balance between:

  • capsule capacity
  • ease of swallowing
  • practical daily use

Size 0 capsules are commonly used for both home capsule filling and commercial supplement manufacturing.


Size 0 Capsule Capacity Chart

MeasurementSize 0 Capsule
Approximate Volume0.68 ml
Approximate Capacity (Low Density Powder)300–450 mg
Approximate Capacity (Medium Density Powder)450–700 mg
Approximate Capacity (Dense Powder)700–900 mg
Capsule LengthApprox. 21.2 mm
Typical UseMedium to large supplement doses

How Much Powder Fits in a Size 0 Capsule?

The amount of powder that fits inside a size 0 capsule depends on the powder density.

Light fluffy powders weigh less, while dense powders weigh more inside the same capsule.

Example Capacities

Powder DensityApproximate Fill Weight
0.4 g/ml272 mg
0.6 g/ml408 mg
0.8 g/ml544 mg
1.0 g/ml680 mg

Size 0 Capsule Volume

Size 0 capsules have an approximate internal volume of:

0.68 ml0.68\text{ ml}0.68 ml

This makes them a versatile capsule size suitable for many supplement formulations.


Size 0 Capsule Dimensions

DimensionApproximate Size
Closed Length21.2 mm
Diameter7.6 mm
Volume0.68 ml

Actual dimensions may vary slightly depending on manufacturer and capsule material.


What Are Size 0 Capsules Used For?

Size 0 capsules are commonly used for:

  • vitamins
  • herbal supplements
  • mushroom powders
  • amino acids
  • nutritional supplements
  • custom formulations

They are one of the most widely used capsule sizes due to their balance of capacity and swallowability.


Are Size 0 Capsules Easy to Swallow?

Yes. Size 0 capsules are generally considered easier to swallow than larger sizes such as:

  • size 000
  • size 00

This makes them popular for daily supplement use.


Gelatin vs HPMC Size 0 Capsules

Size 0 capsules are available in:

  • gelatin capsules
  • HPMC vegetarian capsules

Gelatin Capsules

  • traditional capsule material
  • smooth texture
  • widely used in supplements

HPMC Capsules

  • vegetarian and vegan friendly
  • plant-based capsule material
  • suitable for clean-label products

How to Fill Size 0 Capsules

Size 0 capsules can be filled:

  • manually by hand
  • using capsule filling trays
  • using capsule filling machines

Basic Filling Process

  1. Separate the capsule halves
  2. Fill the larger body section
  3. Tamp powder if required
  4. Close the capsule securely

Powder Density and Capsule Capacity

Capsule capacity always depends on powder density.

The same size 0 capsule may hold:

  • 300mg of a light powder
  • 700mg+ of a dense powder

You can use our Powder Density Calculator for more accurate estimates.


Frequently Asked Questions

What is the volume of a size 0 capsule?

The approximate volume is 0.68 ml.

How many mg fit in a size 0 capsule?

Typically between 300mg and 800mg depending on powder density.

Are size 0 capsules vegetarian?

HPMC size 0 capsules are vegetarian and vegan friendly.

What are size 0 capsules used for?

They are commonly used for supplements, herbs, vitamins, and nutritional powders.

Are size 0 capsules easy to swallow?

Yes. Size 0 capsules are considered one of the most comfortable sizes for regular supplement use.


Related Pages

  • Capsule Size Chart
  • Powder Density Calculator
  • Capsule Size Calculator
  • Gelatin vs HPMC Capsules
  • Size 00 Capsule Capacity
  • Size 000 Capsule Capacity