Guides · Nappies · Cost
What is the total cost of cloth nappies for one child versus two children in the UK?
What is the honest one-child versus two-child split?
Count the kit once. Count laundry once per child still in nappies. Count replacements only when elastics, Velcro or wraps have actually gone. Which? (11 February 2026) says reusables are cheaper in the long run, particularly if more than one child uses them. WRAP (4 March 2015) said first-baby saves were around £200–£500 over 2.5 years, and more if reused — a stale £ band, useful only as direction.
Swipe sideways for the full table
| Line | One child | Two children on the same stash |
|---|---|---|
| Reusable kit | Pay once (Which? 15–25 nappies is a common full-time range) | Usually £0 extra unless you add a few extras for overlap |
| Changes before potty | NHS Best Start: as many as ~4,500 | A second run of the same order — still washed, not bought as packs |
| Laundry electricity | Washes × labelled kWh × Ofgem / bill rate | A second stretch of washes; overlap may raise weekly cycles |
| Metered water | Litres × company £/m³ | Same formula on the extra litres |
| Wraps / elastics you replace | During years two to four (Which? typical life) | More likely on child two if the first child used the stash hard |
| Disposable packs avoided | One child's pack run | Two children's pack runs |
How should I use the NHS 4,500-change figure?
NHS Best Start says you may change as many as 4,500 nappies before your baby is potty-trained. The same page, and the NHS newborn changing guide, put early days at 10 to 12 changes and later days at 6 to 8. WRAP's 2015 range was 4,000 to 6,000 disposables per child. Use 4,500 as the change-count source, not as a price.
Two children is not automatically 9,000 cloth nappies sitting in a cupboard. It is two runs of those changes through the same 15 to 25 washable nappies, plus the covers you replace. Which? gives a life of 400 to 500 washes or two to four years per nappy — tight if two children overlap for a long time, easier if there is a gap.
What do dated UK retailer tables show for one child versus two?
Independent pages rarely publish a full one-versus-two spreadsheet. A Nappy Lady table using May 2023 energy, water and pack prices (page updated 1 June 2025) is the detailed UK structure still on the open web. Those £ cells are their kits and their till prices, not MayTally rates and not 2026 Ofgem maths.
Swipe sideways for the full table
| Route (their labels) | Their total for 1 child | Their total for 2 children | Extra they attribute to child two |
|---|---|---|---|
| Terry square kit listed at £100 | £348.17 | £563.96 | About £216 |
| Mid kit listed at £249.99 | £497.14 | £712.75 | About £216 |
| Higher kit listed at £414 | £664.19 | £880.01 | About £216 |
| Aldi Mamia disposables (their May 2023 packs) | £360.22 | £702.44 | About £342 |
| Pampers (their May 2023 Tesco packs) | £1,436.98 | £2,873.96 | About £1,437 |
On that May 2023 sheet the extra cloth child costs about the same (~£216) whichever kit you started with, because child two is laundry-heavy. The extra Mamia child is larger (~£342) because packs repeat. Rebuild both extras with today's unit rate and today's Aldi or branded shelf prices.
How do I rebuild the two-child total with today's tariff?
- Put the kit on child one only Use your receipt. Which? notes 15–25 reusables. Do not invent a 2026 national kit average.
- Estimate washes per child Which? : every two to three days. About 122–183 washes a year. Two sequential children ≈ two of those years-to-potty blocks. Overlap raises weekly cycles while both are in nappies.
- Apply Ofgem or your bill, not 33p/kWh Energy = washes × (kWh per 100 cycles ÷ 100) × unit rate. Published Direct Debit averages on 10 September 2026: 26.11p then 26.32p per kWh. The May 2023 retailer sheet used 33p.
- Add metered water and replacements Thames Water from 1 April 2026: £2.7346/m³ clean + £1.4721/m³ wastewater — only if you have a meter. Then add wraps you actually replace on child two.
- Compare with two disposable lifetimes NHS ~4,500 changes × your pence-per-nappy, twice. Do not reuse a 2023 Pampers pack price as if it were current. Date every shelf figure.
When does the two-child cloth total stop looking cheaper?
The May 2023 retailer sheet already shows a mid kit on one child (£497) above Mamia on one child (£360). Two children flips that sheet (cloth £713 versus Mamia £702) — close enough that a tumble dryer or a hotter wash can erase the cloth side. Against their Pampers column, two children still leave a large gap. Which? does not publish an Aldi-versus-cloth two-child total; it only flags "particularly if more than one child".
If child two needs a new stash because the first set has hit Which?'s 400–500 wash ceiling, you are back to a one-child kit problem. That is a replacement, not the incremental laundry-only case.
In shortOne child = kit + laundry. Two children = the same kit + a second laundry stretch + replacements. NHS ~4,500 changes is the usage source. Dated retailer £ columns are examples with a May 2023 tariff, not a 2026 official pair of totals.
What should I leave out of the one-versus-two table?
- A made-up 2026 disposable pack catalogue — date every till price or omit it.
- Council vouchers and hire — they change child one's kit line only.
- Australian economics pages — different tariffs.
- A promise that two children always beat Aldi. The May 2023 mid-kit row was already close.
Questions parents ask
- Is the NHS 4,500 figure per child or for the household?
- Per child, before that child is potty-trained. Two children means a second run of changes. Cloth does not multiply the number of nappies you store by the same factor — it multiplies washes.
- Why is the extra cloth child cheaper than the extra disposable child on that 2023 table?
- Because the kit is not bought twice. The extra cloth column on that sheet is mostly washing at their May 2023 33p/kWh. The extra disposable column is another full pack run. Rebuild both with today's unit rate and today's packs.
- Do I count overlapping twins as two children?
- Yes for changes and for how fast the drum fills. You may need more than 15–25 nappies in circulation. The kit line is larger than a sequential sibling; the laundry line is closer to two children at once.
- Which? only says "particularly if more than one child". Is that a £ figure?
- No. It is a qualitative note on their February 2026 buying guide, next to the MoneyHelper 2024 £1,000 / £400 2.5-year snapshot. The one-versus-two pounds still have to come from your kit, your tariff and dated pack prices.
Sources
Official pages first. If this page and the official page disagree, the official page wins.
- NHS Best Start — Changing a nappy (~4,500 changes) — checked 10 September 2026
- NHS — How to change your baby's nappy (10–12 / 6–8 a day) — checked 10 September 2026
- Which? — Are reusable nappies worth it? — checked 10 September 2026
- WRAP — Real nappies overview (4 March 2015) — checked 10 September 2026
- Ofgem — Energy price cap unit rates and standing charges — checked 10 September 2026
- The Nappy Lady — Do reusable nappies really save you money? (May 2023 workings) — checked 10 September 2026
This is information, not a guarantee of any payment, and not medical, legal or product-safety advice for your home. Prices and rules change; figures carry the date they were checked. Recall status comes from official records only — a product we cannot find is not a safety all-clear. Tell us if we got a fact wrong.