Nappies

Nappy Usage Estimator

Estimate nappy, wipe, and bin-bag usage and cost over a selected planning period.

Estimated cost£62212 months

Nappy packs722,557 nappies needed

Wipes packs128

Monthly planning estimate

Typical supplies and spend by selected planning unit.

NappiesWipes packs

Supply breakdown

Monthly nappy cost£39

Monthly wipes cost£13

Pack cost36 nappies per pack£7

Implied nappy costCalculated from pack price and pack size£0.18

Planning days12 months365

Total wipes7,670

Average monthly cost£52

Assumptions

Calculation notes

Usage varies by age, routine, childcare, brand, and individual needs.
The model uses an average month length of 30.4375 days.
Reusable nappies, creams, bags, and changing supplies are not included unless folded into pack or extras assumptions.

Stock planning

How nappy packs are estimated

The estimator thinks in whole packs, because that is how nappies are actually bought.

Pack-count method

The estimator multiplies daily nappy changes by the selected planning period, then rounds up to whole packs using the entered nappies-per-pack value.

It derives implied cost per nappy from pack price and pack size, and estimates wipes if wipes per change are entered.

Shopping pathnappies per day x planning days -> total nappies; total nappies / pack size -> packs rounded up; packs x pack cost -> estimated cost

Monthly stock example

Example: monthly nappy stock

Nappies per day: 7
Planning period: 30 days
Pack size and pack cost: entered by user

Result: The result rounds up to whole packs so the shopping estimate matches real buying.

Avoid overbuying one small size because fit and growth can change quickly.

Avoiding overbuying

Newborns often use more nappies than older babies, but individual routines vary.
Recalculate when the baby changes size, starts nursery or has a major routine change.

Content reviewed: 7 September 2026.

NHS baby care guidance How TallyKind works

Guide