Adult nappies are commonly called adult diapers in North American English. In the UK, Australia, Ireland, and many international markets, the term adult nappies is widely used.

Adult diapers can cost anywhere from about $0.50 to $2.00 or more per piece at retail, depending on the product type, absorbency level, size, pack quantity, and local market. For many users, a practical monthly budget falls between $60 and $240+.

The monthly cost of adult diapers varies widely because every user has different needs. A person with light urinary leakage may only use one or two products per day, while someone managing heavier incontinence may need several changes daily and more absorbent protection overnight.

For people managing nighttime incontinence, interrupted sleep can become a routine concern. Leaks, repeated bedding changes, skin discomfort, and anxiety about accidents can affect both the wearer and the caregiver. This leads to a common question: are overnight diapers worth it?In many cases, yes.