Cheapest Nappies in the UK 2026: Cost-Per-Nappy Comparison
Nappy headline prices hide huge cost-per-unit differences. We worked out the real per-nappy cost across Aldi, Lidl, Asda, Tesco, Boots, Sainsbury's, Morrisons and Amazon UK.
By The Assistant De Venté Editors
A baby in nappies goes through roughly 2,200 nappies in their first year and another 1,500 in year two — call it 4,000 nappies total. A 2p per-nappy difference is £80 over that period. A 5p difference is £200. So this is a category where the maths really matters.
We compared cost-per-nappy across the main UK retailers for size 4 (the biggest category by sales) in May 2026.
Cheapest cost-per-nappy (size 4, June 2026)
- Aldi Mamia Ultra Dry — 78 nappies for £4.49 = 5.8p/nappy (cheapest)
- Lidl Lupilu — 70 nappies for £4.49 = 6.4p/nappy
- Asda Little Angels — 80 nappies for £5.50 = 6.9p/nappy
- Morrisons Nutmeg — 64 nappies for £4.50 = 7.0p/nappy
- Tesco Fred & Flo — 80 nappies for £6.00 = 7.5p/nappy
- Sainsbury's Little Ones — 60 nappies for £4.75 = 7.9p/nappy
- Pampers Baby-Dry (Asda Mega) — 124 nappies for £18.00 = 14.5p/nappy
- Pampers Premium Protection — typically 18–22p/nappy
The premium brand reality
Pampers and Huggies cost roughly 2–3x the supermarket own-brand. Independent reviews (Which?, MadeForMums) consistently rank Aldi Mamia in the top 3 nappies overall, often above the more expensive branded options on absorbency and leak protection. Premium brands are not categorically better — they're better at marketing.
Where to actually buy
For routine use: Aldi Mamia, in person at Aldi. Avoid online resellers — Mamia is not officially sold via Amazon and listings there are marked up 40-60%.
For Amazon Subscribe & Save deal-hunters: Pampers Pure (the more skin-friendly Pampers line) goes to ~11p/nappy on a 5-subscription stack — still more expensive than Aldi but cheaper than Pampers Premium.
For overnight / heavy wetters: Pampers Baby-Dry Night or Huggies Overnight at Boots Parenting Club (10x Advantage points). Real per-nappy cost after points: ~13p — worth it only for night use.
When to size up
Most parents leave babies in a size too small for too long, which (a) leaks more and (b) actually costs more per night (you use more nappies). If you're getting leaks, the answer is almost always sizing up, not changing brand.
Set a price alert
Nappy prices churn — Asda runs roughly monthly multi-buy events on Pampers (3 packs for £30), and Boots stacks 3-for-2 with Parenting Club points 4–5 times a year. A price alert at your preferred brand catches these without you watching.
Bottom line
Aldi Mamia at 5.8p/nappy is the cheapest in the UK and one of the best-rated. Going premium with Pampers Premium Protection costs about £400 more per year per child for marginal real-world difference. The honest budget play: Mamia by day, Pampers Baby-Dry Night for overnight use. Total annual saving versus all-Pampers: ~£350.