What Do Incontinence Pad Absorbency Ratings Actually Mean?

When choosing incontinence pads or pants, you might notice an absorbency figure in millilitres, a row of drop symbols, or description such as "Plus", "Super", and "Maxi". 

But what do these labels actually tell you? Does a higher number always mean better protection? And can a product described as holding 2,000 ml really manage that amount during everyday use? 

Incontinence pad absorbency ratings are a useful starting point, but they do not tell the whole story. Fit, product design, the way leakage happens and your daily routine all influence how well your protection works. 

Here is how to understand the numbers and choose with greater confidence. 

What does absorbency in millilitres mean? 

A millilitre, usually written as ml, is a measurement of liquid volume. For example: 

Absorbency figure	Equivalent volume
500ml	Half a litre
1,000ml	One litre
2,000ml	Two liters

When an incontinence product lists an absorbency figure in millilitres, it describes its stated liquid-holding capacity under the condition used to assess it. 

The important question is: how was that capacity measured? 

A figure may represent laboratory-tested total capacity rather than the amount the product can reliably contain while being worn. Check the manufacturer's explanation before comparing products. 

For example, a stated capacity of 2,000ml should not be treated as a promised that the product will contain two litres of urine without leaking in everyday use. It also does not tell you how many hours you can wear it. 

What do the drop symbols on incontinence product mean? 

Drop symbols offer a quick visual guide to absorbency. Within a particular manufacturer's range, more filled-in drops generally indicate a higher absorbency level. 

However, drop symbols are not a universal measurement system. A five-drop product from one brand is not automatically equivalent to a five-drop product from another. 

Similarly, descriptions such as "Normal", "Extra", "Super", and "Maxi" need to be read within the context of the particular product range. 

When comparing products: 

• Check the manufacturer's explanation of its scale. 
• Compare similar product styles and the relevant sizes. 
• Look at any stated capacity and its test method. 
• Consider the recommended use alongside the rating.

A drop symbol does not represent a fixed number of millilitres or a guaranteed number of hours of protection. 

How is incontinence pad absorbency tested? 

One recognised laboratory method is ISO 11948-1, commonly called the Rothwell test. 

This method measures the absorption capacity of the absorbent core. Broadly, the product is weighed dry immersed in a saline solution, allowed to drain and weighed again. The different in weight indicates how much test liquid it has retained. 

The result is measured by weight; consumer product information may present capacity in millilitres. 

Standardised testing helps manufacturers assess products under repeatable conditions. However, it does not recreate wearing a pad while walking, sitting or sleeping. Features that help a product fit and contain leakage are not fully assessed by this capacity test. 

That is why the Absorbent Hygiene Product Manufacturers Association's testing guidance advises against using total laboratory absorption as the main measure of product performance. 

Not every advertised absorbency figure necessarily comes from the same test. If the method is unclear, ask the supplier. 

Laboratory absorbency versus everyday performance 

In a laboratory, a product is exposed to liquid under controlled conditions. During everyday wear, liquid reaches particular areas of the pad while the product moves with your body. 

Several factors can affect the result: 

Factor	Why it matters during everyday use
Leakage speed	A sudden release of urine presents a different challenge from occasional small drips.
Position	Standing, sitting, lying down change where liquid reaches the product.
Pressure	Sitting or lying on a wet absorbent core can affect containment
Fit and movement	Gaps, bunching or a product moving out of position can allow leakage.
Product design	Core placement, leakage barriers and fastenings affect how protection works on the body.

Continence Product Advisor    explains that laboratory capacity can be considerably higher than capacity during actual use. 

There is no single reliable calculation that converts every laboratory rating into an individual's usable capacity. Avoid assuming that you can divide a stated figure by a fixed number to find your personal limit. 

Absorption capacity is different from absorption speed 

Two products can have similar total capacities yet respond differently when liquid reaches them. 

It helps to distinguish between: 

• Capacity: how much liquid the absorbent material can hold under the stated test conditions. 
• Absorption speed: how quickly liquid moves into the absorbent core. 
  
• Retention and surface dryness: how well liquid remains held away from the surface, including under pressure. 
  

A large capacity figure alone does not describe all three. 

This helps explain why a product may leak even when parts of its absorbent still look dry. Liquid may escape before it reaches unused areas, particularly if, the fit or positioning is unsuitable. 

Why the highest absorbency number is not always the best choice

The most suitable product is one that balances protection with comfort and practicality. 

1. Correct fit matters 

For pants and all-in-ones, follow the product's measurement guide. Do not choose larger size simply because it has a higher stated absorbency. 

A product that is too loose may leave gaps; one that is too tight may feel uncomfortable and sit incorrectly. 

2. Product style matters 

Think about how you put on and change your protection. An underwear-style product and a product with adjustable side fastenings can offer very different experience. 

Our guide to incontinence pads, pull-up pants and all-in-ones explains the main differences. 

3. Your routine matters 

Consider when leakage happens, your mobility, access to a toilet and whether you need assistance with changing. Daytime and overnight needs may differ. 

4. Comfort matters 

Consider bulk, softness, movement and how the product feels beneath clothing. Extra capacity is useful when needed, but it should not be the only reason to choose a product. 

5. Changing needs still matter 

A high absorbency rating does not remove the need for appropriate changes or regular toileting. 

Follow the product instructions, your comfort and skin care needs, and any individual care plan. Do not wait for a product to reach its advertised maximum capacity before changing it. 

A simple checklist for comparing incontinence products 

Before buying, ask: 

1. What does the rating measure? Is it total laboratory capacity or another measure? 
2. Am I comparing like with like? Check product style, size and test method. 
   
3. Does the fit suit me? Use the manufacturer's measurements. 
   
4. Does it match my leakage and routine? Consider activity, position and ease of changing. 
   
5. Can I try a sample? Assess comfort and initial performance before committing to a full pack. 
   

If you experience persistent leakage, review fit, positioning and product style alongside absorbency. Simply choosing the highest number may not resolve the problem. 

Frequently asked questions 

Does a 2,000ml rating mean I can wear the product all day?

No, Capacity is not a wear-time recommendation. Changing needs vary with leakage, comfort, skin condition, product instructions and any care plan. 

Are six-drop pads always more absorbent than four-drop pads? 

Within the same manufacturer's scale, more drops usually indicate greater absorbency. Across different brands or ranges, the symbols may not be directly comparable. 

Can a lower-rated product work better for me? 

Yes. A product with an appropriate capacity and a better fit or design for your needs may provide a more satisfactory experience than a higher-rated product that does not fit well. 

Do urine absorbency ratings tell me whether a product suits bowel incontinence? 

No. A liquid absorbency figure does not establish suitability for bowel leakage. Check the intended use and seek advice from a continence professional when choosing protection. 

Find protection that works for you 

Understanding incontinence pad absorbency ratings can make shopping less confusing. Use millilitres and drop symbols to help narrow your options, then consider fit, comfort, design and everyday performance. 

Try a Sample of Novamed to explore the fit feel before purchasing a full pack. Delivery charges apply. 

Need help understanding the Novamed range? Call 0808 196 2070, email to info@novamedeurope.com, or chat with us at novamedpads.co.uk. 

Incontinence products help manage leakage but do not treat its underlying cause. The NHS recommends speaking to a GP if you experience urinary incontinence. 

Live Comfortably. Live Confidently.