Choosing The Right Capsule Size for Your Capsule Filling Machine

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Aside from knowing what your objectives are, choosing the ideal capsule sizes for your capsule filling machine entails you likewise consider factors such as the production capacity, the capsule’s recommended dosage, how easy it is to swallow, your machine’s features, the costs, and of course, your target consumers. 

In this guide, you’ll delve deeper into these, and learn the following: 

  • Eight standard capsule sizes
  • Formula for the capsule size
  • How to choose the right capsule sizes
  • Factors to consider 
  • The importance of capsule filling machines

Are You Looking For A Fully Automatic Capsule Filling Machine?

Overview of Capsule Sizes

Firstly, capsules are usually cylindrical packaging for medicines, supplements, and vitamins, which you can swallow. If your medications are not in tablet form, they are in capsule form. 

Pharmaceutical manufacturers that use capsule filling machines must have knowledge of the different capsule sizes, which are typically depending upon the dosage they are expecting to provide.

These capsule sizes are in systematic numerical format, too, so it’s easy to remember them. The biggest size is termed 000, while the smallest is 5. You will know more about these as you read on.

What Are the 8 Standard Capsule Sizes?

To better understand the eight different standard capsule sizes, start by checking out this capsule size chart:

SizeOverall Capsule Length (inches)Average mg CapacityVolume Capacity
Size 000 capsules1.029800 – 1,600 mg1.37 ml
Size 00 capsules0.921600 – 1,100 mg1.00 ml
Size 0 capsules0.85400 – 800 mg0.68 ml
Size 1 capsules0.764300 – 600 mg0.48 ml
Size 2 capsules0.693200 – 400 mg0.36 ml
Size 3 capsules0.618162 – 324 mg0.27 ml
Size 4 capsules0.563120 – 240 mg0.20 ml
Size 5 capsules0.40660 – 100 mg0.13 ml

How Do I Know My Capsule Size?

Now that you’ve got the capsule sizes explained in the capsule size comparison chart above, let’s get to know more about this a little bit better.

Interestingly, to know your capsule size is to refer to a capsule size chart, such as what you saw above. From the biggest to the smallest, the sizes are named 000 to size 5. The size depends on where you wish your consumers to use your product. 

For instance, 000 capsules are for those with higher dosages or several active ingredients, such as sports supplements. 

Meanwhile, the size 1 capsules are intended for those with lower dosages, such as what you see with herbal supplements and multivitamins. The smallest capsules are size 5, suitable for smaller doses or those that children and pets take. 

What Is the Formula for Capsule Size?

The formula for capsule measurements is as follows:

For the capsule’s volume, it is: 

For the capsule’s surface area, follow this formula:

What is the Difference Between Capsule Size 4 and 5?

Capsule sizes 4 and 5 are the tiniest capsules. You can see their differences in overall capsule length, average capacity in milligrams, and volume capacity from the chart earlier. 

In terms of use and purpose, size 4 capsules are rarely used beyond specialized medical applications, such as smart pills for diagnostic tracking. Instead, they’re used for supplements and specialty treatments.

Meanwhile, a size 5 capsule is primarily utilized in pharmaceuticals. Aside from pediatric and veterinary medicine, they are also for applications, such as low-dose hormone therapy, homeopathic remedies, and research purposes. 

What is the Most Popular Capsule Size?

The size 00 is the most popular capsule size because of this 00 capsule capacity that could be higher than other capsule sizes, but in the right range. With these size 00 capsule dimensions, they are also very versatile and still easy to swallow despite their dosage.  

How to Select Capsule Size?

Selecting the right capsule size is vital to ensure you are not choosing a smaller capsule size for a bigger purpose, or the conversely. This guarantees effective dosage and consumer compliance. 

To choose the right size for the capsule you are manufacturing, following these steps:

  • Consider its intended dosage. 
  • Evaluate the filler material’s density. For larger-sized capsules, use denser substances. 
  • Think about how easy the capsule will be to swallow. 
  • Lastly, assess the appearance and branding you want for your product. 

By adhering to these pointers, you can ensure your consumers are always satisfied. 

Common Capsule Sizes and Their Applications

Size 000 Capsules

  • Dietary supplements: Protein and spirulina powders, herb-based supplements, etc.
  • Bulk ingredients: Ashwagandha products, psyllium husk, and other bulk remedies in powder form
  • Veterinary medicine: Horse and livestock medicines
  • Nutraceuticals: High-potency vitamin blends or amino acids for workout enthusiasts, athletes, and bodybuilders

Size 00 Capsules

  • Sports nutrition: Supplements before workout, creatine, and energy boosting supplements and products
  • Medicinal herbs: Milk thistle, turmeric products, and other herb-based treatment formulas
  • Detoxification blends: Charcoal products, Bentonite clay products, and other supplements for detoxification
  • Pet medicines with moderate doses

Size 0 Capsules

  • Daily vitamin intake products, such as multivitamins and mineral-based supplements
  • Antibiotics and pills to combat inflammation
  • Probiotics
  • Personalized doses for tailored treatments

Smaller Sizes (1, 2, 3, 4, 5)

  • Melatonin and other medications in low dosage
  • Pediatric care
  • Specialized therapies, such as clinical trials and experimental medicine
  • Luxury supplements and beauty treatments, like collagen and skin care products
  • Homeopathy
  • Pet care

Factors to Consider When Selecting Capsule Size

Required Dosage

Before you determine what shape capsules will take, it is important to consider factors, starting with the required dosage. How much of the active ingredient is needed for your product to be effective. Aside from the dosage, the right ingredient mix in each capsule must also be taken into account. 

Bulk Density of the Formulation

This factor, on the other hand, also considers the active ingredient needed, but based on its volume this time. For example, larger capsules for plant powders and smaller ones for high-density formulations. This also ensures your products will perform at their best.

Swallowability

Children can’t readily swallow a large capsule. Matching swallowability with the size of the capsules you’re producing will ensure your consumers will keep trusting your products. 

Capsule Type

The type of capsule you’re making, such as gelatin or HMPC, also dictates the proper size. 

Refer to this chart below to be guided:

Capsule Type00000012345
Gelatin
HMPC
VegetableXXXXX

What Are Capsule Filling Machines? How Important Are They?

Taking the route of not investing in such machines will hamper your production – slower production, lesser revenue, and higher risk of contamination for the capsules you make. 

Also called capsule fillers or encapsulators, they are a kind of processing equipment that pharmaceutical manufacturing industries use to fill empty capsules with formulations, such as powder, granules, liquids, and even combinations of them. For instance, for making a soft capsule gelatin. 

What are their importance? Basically, they accelerate the efficiency of producing higher-grade capsules in large-scale, capsules that are free from contamination before they are distributed to consumers. 

Automatic capsule-filling machine from Canaan
Automatic capsule-filling machine from Canaan
Automatic capsule-filling machine from Canaan

They are also used so capsule-filling is more accurate, more capsules are produced in less time, and the quality of the capsules is preserved.

Aside from those advantages, choosing the right capsule filling machine also allows you to produce the correct capsule sizes. With the equipment’s design and features, especially its molds, you can ensure to produce the right capsule sizes efficiently and accurately for the specific needs of your consumers.

Conclusion

Selecting the right capsule size for your capsule filling machine must be accomplished with utmost care to ensure you offer the best-quality products and so as not to compromise the safety of your consumers. 

Apart from choosing the proper capsule size, you must also understand the purposes and applications of each, the differences between each of those sizes including the measurement formula, and what you must consider, from the dosage pre-requisites to the particular type of capsule. 

In addition, you must also know your capsule filling machine well. Without the appropriate equipment, you can’t produce quality capsules even if you’ve mastered their sizes well. 

Get your capsule filling machines only from credible providers, such as Zhejiang Canaan Technology Limited. The capsule filling machines here are expertly designed and crafted to carry out fully automated encapsulation processes, from accurate capsule alignment to the proper ejection of completed capsules. Connect with them today.

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