Sainsbury's Mashed Potato — 400g
As of 8 Oct 2026, Sainsbury's Mashed Potato 400g is cheapest at Sainsbury's at £0.95 (£2.38/1 kg) in United Kingdom.
Prices updated 8 Oct 2026
Lowest recorded price: £0.95 at Sainsbury's (8 Oct); highest: £2.75 — currently £0.95 at Sainsbury's. Tracked since Jul 2026.
Showing prices and history for this variant plus 2 sibling variations — the same product and flavour across pack sizes, with unit prices keeping different sizes comparable. Lowest and highest values match the extension's price-history panel.
Price History
Price over timeLoading price history…
Price
| Retailer | Brand | Size | Price | Unit Price | In Stock | Updated |
|---|---|---|---|---|---|---|
 Sainsbury's | Sainsbury's | 900g | £2.00 | £0.22/100gBest | In stock | 8 Oct |
| Sainsbury's | Sainsbury's | 400g | £0.95 | £0.24/100g | In stock | 8 Oct |
| Sainsbury's | Sainsbury's | 800g | £2.25 | £0.28/100g | In stock | 8 Oct |
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Ranked per 1 kg at each item's cheapest store
Cheapest by product
Ranked per 1 kg at each item's cheapest store
Sainsbury'sUpdating prices — showing the previous selection until the new prices arrive.
Prices shown are indicative and may vary by store location. Confirm pricing at checkout.
Frequently asked questions
- Where is Sainsbury's Mashed Potato 400g cheapest?
- Sainsbury's has the lowest price at £0.95 (£2.38/1 kg).
- What is the unit price of Sainsbury's Mashed Potato 400g?
- Priced per 100g. Sainsbury's offers the best value at £0.24/100g.
- What is the lowest price ever for Sainsbury's Mashed Potato 400g?
- The lowest price CartSorted has recorded for Sainsbury's Mashed Potato 400g is £0.95 at Sainsbury's (8 Oct), since we began tracking in Jul 2026. The current cheapest price is £0.95 at Sainsbury's.