Cheapest Diet Coke — Offers & Deals This Week
Every Diet Coke product we track across Morrisons, Tesco, Asda and Sainsbury's — 66 lines ranked by £/litre so you can see which pack size and which shop is actually cheapest.
66Products
30On offer
4Supermarkets
£0.75Cheapest £/litre
66 drinks
| Product | Shop | Size | Price | Deal price | Per can/bottle | £/litre | £/litre after deals | Saving | |
|---|---|---|---|---|---|---|---|---|---|
 Diet Coke Cola 2L Bottle✓ Same price at Sainsbury's or Tesco | Asda | 1 × 2000ml | £2.08 | £1.50 (buy 2) Any 2 for £3 | £1.50 | £1.04 | £0.75per litre after deals | 28% | Any 2 for £3 |
 Diet Coke No Caffeine Cola 2L Bottle✓ Same price at Sainsbury's or Tesco | Asda | 1 × 2000ml | £2.08 | £1.50 (buy 2) Any 2 for £3 | £1.50 | £1.04 | £0.75per litre after deals | 28% | Any 2 for £3 |
| Asda | 1 × 2000ml | £2.08 | £1.50 (buy 2) Any 2 for £3 | £1.50 | £1.04 | £0.75per litre after deals | 28% | Any 2 for £3 | |
| Sainsbury's | 1 × 2000ml | £2.45 | £1.50 (buy 2) Buy any 2 for £3.00 with Nectar | £1.50 | £1.23 | £0.75per litre after deals | 39% | Buy any 2 for £3.00 with Nectar | |
| Sainsbury's | 1 × 2000ml | £2.45 | £1.50 (buy 2) Buy any 2 for £3.00 with Nectar | £1.50 | £1.23 | £0.75per litre after deals | 39% | Buy any 2 for £3.00 with Nectar | |
| Sainsbury's | 1 × 2000ml | £2.45 | £1.50 (buy 2) Buy any 2 for £3.00 with Nectar | £1.50 | £1.23 | £0.75per litre after deals | 39% | Buy any 2 for £3.00 with Nectar | |
 Diet Coke Soft Drink Bottle 2L✓ Same price at Asda or Sainsbury's | Tesco | 1 × 2000ml | £2.25 | £1.50 (buy 2) Any 2 for £3 Clubcard Price | £1.50 | £1.12 | £0.75per litre after deals | 33% | Any 2 for £3 Clubcard Price |
 Diet Coke No Caffeine 2L✓ Same price at Asda or Sainsbury's | Tesco | 1 × 2000ml | £2.09 | £1.50 (buy 2) Any 2 for £3 Clubcard Price | £1.50 | £1.04 | £0.75per litre after deals | 28% | Any 2 for £3 Clubcard Price |
| Tesco | 1 × 2000ml | £2.09 | £1.50 (buy 2) Any 2 for £3 Clubcard Price | £1.50 | £1.04 | £0.75per litre after deals | 28% | Any 2 for £3 Clubcard Price | |
| Morrisons | 1 × 2000ml | £2.15 | £1.50 (buy 2) Buy 2 for £3 | £1.50 | £1.08 | £0.75per litre after deals | 30% | Buy 2 for £3 | |
 Diet Coke Cola 1.25L Bottle✓ Same price at Morrisons | Asda | 1 × 1250ml | £1.00 | — | £1.00 | £0.80 | £0.80per litre | £1.00 | |
 Diet Coke Cola 1.25L Bottle✓ Same price at Asda | Morrisons | 1 × 1250ml | £1.00 | — | £1.00 | £0.80 | £0.80per litre | £1.00 | |
| Sainsbury's | 1 × 1250ml | £1.65 | £1.25 Nectar Price | £1.25 | £1.32 | £1.00per litre after deals | 24% | Nectar Price | |
 Diet Coke Cola 30 x 330ml Cans✓ Cheapest of 2 shops | Morrisons | 30 × 330ml | £10.00 | — | 33p | £1.01 | £1.01per litre | £10.00 · 33p each | |
 Diet Coke Cola 24 x 330ml Cans✓ Same price at Tesco | Sainsbury's | 24 × 330ml | £12.00 | £8.50 Nectar Price | 35p | £1.52 | £1.07per litre after deals | 29% | Nectar Price |
 Diet Coke No Caffeine Cola 24 x 330ml Cans✓ Same price at Tesco | Sainsbury's | 24 × 330ml | £12.00 | £8.50 Nectar Price | 35p | £1.52 | £1.07per litre after deals | 29% | Nectar Price |
 Diet Coke Soft Drink Cans 24 x 330 mL✓ Same price at Sainsbury's | Tesco | 24 × 330ml | £12.00 | £8.50 Clubcard Price | 35p | £1.52 | £1.07per litre after deals | 29% | Clubcard Price |
 Diet Coke No Caffeine 24x330ml✓ Same price at Sainsbury's | Tesco | 24 × 330ml | £12.00 | £8.50 Clubcard Price | 35p | £1.52 | £1.07per litre after deals | 29% | Clubcard Price |
 Diet Coke Cola 18 x 330ml Cans✓ Cheapest of 2 shops | Asda | 18 × 330ml | £9.24 | £7.50 (buy 2) Any 2 for £15 | 42p | £1.56 | £1.26per litre after deals | 19% | Any 2 for £15 |
| Tesco | 1 × 1250ml | £1.65 | — | £1.65 | £1.32 | £1.32per litre | £1.65 | ||
 Diet Coke Soft Drink Cans 8 x 330mL✓ Cheapest of 4 shops | Tesco | 8 × 330ml | £4.25 | £3.50 Clubcard Price | 44p | £1.61 | £1.33per litre after deals | 18% | Clubcard Price |
| Tesco | 8 × 330ml | £4.25 | £3.50 Clubcard Price | 44p | £1.61 | £1.33per litre after deals | 18% | Clubcard Price | |
 Diet Coke No Caffeine Cola 8 x 330ml Cans✓ Cheapest of 3 shops | Morrisons | 8 × 330ml | £4.25 | £3.75 | 47p | £1.61 | £1.42per litre after deals | 12% | |
 Diet Coke Cola 8 x 330ml Cans↓ 25p less at Tesco → | Morrisons | 8 × 330ml | £4.25 | £3.75 | 47p | £1.61 | £1.42per litre after deals | 12% | |
 Diet Coke Cola 30 x 330ml Cans↓ £4.24 less at Morrisons → | Asda | 30 × 330ml | £14.24 | — | 47p | £1.44 | £1.44per litre | £14.24 · 47p each | |
 Diet Coke Cola 24 x 330ml Cans↓ £3.50 less at Sainsbury's or Tesco → | Morrisons | 24 × 330ml | £12.00 | — | 50p | £1.52 | £1.52per litre | £12.00 · 50p each | |
 Diet Coke Cola 4 x 330ml Cans✓ Cheapest of 2 shops | Morrisons | 4 × 330ml | £2.00 | — | 50p | £1.52 | £1.52per litre | £2.00 · 50p each | |
| Tesco | 15 × 330ml | £7.90 | — | 53p | £1.60 | £1.60per litre | £7.90 · 53p each | ||
 Diet Coke Cola 18 x 330ml Cans↓ £2.00 less at Asda (multibuy) → | Sainsbury's | 18 × 330ml | £9.50 | — | 53p | £1.60 | £1.60per litre | £9.50 · 53p each | |
 Diet Coke Cherry Cola 8 x 330ml Cans✓ Cheapest of 3 shops | Asda | 8 × 330ml | £4.24 | — | 53p | £1.61 | £1.61per litre | £4.24 · 53p each | |
 Diet Coke No Caffeine Cola 8 x 330ml Cans↓ 49p less at Morrisons → | Asda | 8 × 330ml | £4.24 | — | 53p | £1.61 | £1.61per litre | £4.24 · 53p each | |
 Diet Coke Cola 8 x 330ml Cans↓ 74p less at Tesco → | Asda | 8 × 330ml | £4.24 | — | 53p | £1.61 | £1.61per litre | £4.24 · 53p each | |
 Diet Coke Cola 6 x 200ml Cans✓ Cheapest of 3 shops | Morrisons | 6 × 200ml | £2.00 | — | 33p | £1.67 | £1.67per litre | £2.00 · 33p each | |
 Diet Coke Cola 8 x 330ml Cans↓ £1.75 less at Tesco → | Sainsbury's | 8 × 330ml | £5.25 | — | 66p | £1.99 | £1.99per litre | £5.25 · 66p each | |
 Diet Coke No Caffeine Cola 8 x 330ml Cans↓ £1.50 less at Morrisons → | Sainsbury's | 8 × 330ml | £5.25 | — | 66p | £1.99 | £1.99per litre | £5.25 · 66p each | |
 Diet Coke Cherry Cola 8 x 330ml Cans↓ £1.01 less at Asda → | Sainsbury's | 8 × 330ml | £5.25 | — | 66p | £1.99 | £1.99per litre | £5.25 · 66p each | |
 Diet Coke Cherry Cola 8 x 330ml Cans↓ £1.01 less at Asda → | Morrisons | 8 × 330ml | £5.25 | — | 66p | £1.99 | £1.99per litre | £5.25 · 66p each | |
 Diet Coke Cola 6 x 200ml Cans↓ 50p less at Morrisons → | Sainsbury's | 6 × 200ml | £3.50 | £2.50 Nectar Price | 42p | £2.92 | £2.08per litre after deals | 29% | Nectar Price |
 Diet Coke Cola 330ml Can✓ Cheapest of 3 shops | Asda | 1 × 330ml | £1.34 | £0.75 (buy 2) Any 2 for £1.50 | 75p | £4.06 | £2.27per litre after deals | 44% | Any 2 for £1.50 |
 Diet Coke Cola 6 x 200ml Cans↓ £1.00 less at Morrisons → | Asda | 6 × 200ml | £3.00 | — | 50p | £2.50 | £2.50per litre | £3.00 · 50p each | |
 Diet Coke Soft Drink Cans 12 x 150 mL✓ Same price at Morrisons | Tesco | 12 × 150ml | £6.40 | £4.50 Clubcard Price | 38p | £3.56 | £2.50per litre after deals | 30% | Clubcard Price |
 Diet Coke Cola 12 x 150ml Cans✓ Same price at Tesco | Morrisons | 12 × 150ml | £6.40 | £4.50 | 38p | £3.56 | £2.50per litre after deals | 30% | |
 Diet Coke Cola 4 x 330ml Cans↓ £1.35 less at Morrisons → | Sainsbury's | 4 × 330ml | £3.35 | — | 84p | £2.54 | £2.54per litre | £3.35 · 84p each | |
 Diet Coke Cherry Cola 500ml Bottle✓ Cheapest of 2 shops | Morrisons | 1 × 500ml | £2.00 | £1.40 (buy 2) Buy 2 for £2.80 | £1.40 | £4.00 | £2.80per litre after deals | 30% | Buy 2 for £2.80 |
| Morrisons | 1 × 500ml | £2.00 | £1.40 (buy 2) Buy 2 for £2.80 | £1.40 | £4.00 | £2.80per litre after deals | 30% | Buy 2 for £2.80 | |
| Tesco | 6 × 200ml | £3.50 | — | 58p | £2.92 | £2.92per litre | £3.50 · 58p each | ||
| Sainsbury's | 1 × 150ml | £0.70 | £0.50 (buy 5) Buy any 5 for £2.50 with Nectar | 50p | £4.67 | £3.33per litre after deals | 29% | Buy any 5 for £2.50 with Nectar | |
| Tesco | 1 × 150ml | £0.70 | £0.50 (buy 5) Any 5 for £2.50 Clubcard Price | 50p | £4.67 | £3.33per litre after deals | 29% | Any 5 for £2.50 Clubcard Price | |
| Asda | 1 × 150ml | £0.58 | £0.50 (buy 5) Any 5 for £2.50 | 50p | £3.87 | £3.33per litre after deals | 14% | Any 5 for £2.50 | |
| Morrisons | 1 × 150ml | £0.70 | £0.50 (buy 5) Buy 5 for £2.50 | 50p | £4.67 | £3.34per litre after deals | 29% | Buy 5 for £2.50 | |
| Asda | 12 × 150ml | £6.34 | — | 53p | £3.52 | £3.52per litre | £6.34 · 53p each | ||
| Sainsbury's | 12 × 150ml | £6.45 | — | 54p | £3.58 | £3.58per litre | £6.45 · 54p each | ||
 Diet Coke Cola Superfan 500ml Can✓ Same price at Morrisons | Asda | 1 × 500ml | £1.80 | — | £1.80 | £3.60 | £3.60per litre | £1.80 | |
 Diet Coke Cola Superfan 500ml Can✓ Same price at Asda | Morrisons | 1 × 500ml | £1.80 | — | £1.80 | £3.60 | £3.60per litre | £1.80 | |
 Diet Coke Cola 500ml Bottle≈ Similar price at Morrisons (5p less) | Asda | 1 × 500ml | £1.85 | — | £1.85 | £3.70 | £3.70per litre | £1.85 | |
| Tesco | 1 × 500ml | £1.85 | — | £1.85 | £3.70 | £3.70per litre | £1.85 | ||
| Tesco | 1 × 500ml | £1.85 | — | £1.85 | £3.70 | £3.70per litre | £1.85 | ||
 Diet Coke Cola 500ml Bottle↓ 20p less at Asda → | Morrisons | 1 × 500ml | £2.00 | — | £2.00 | £4.00 | £4.00per litre | £2.00 | |
| Morrisons | 1 × 500ml | £2.00 | — | £2.00 | £4.00 | £4.00per litre | £2.00 | ||
| Sainsbury's | 1 × 500ml | £2.00 | — | £2.00 | £4.00 | £4.00per litre | £2.00 | ||
| Sainsbury's | 1 × 500ml | £2.00 | — | £2.00 | £4.00 | £4.00per litre | £2.00 | ||
 Diet Coke Cherry Cola 500ml Bottle↓ 60p less at Morrisons (multibuy) → | Sainsbury's | 1 × 500ml | £2.00 | — | £2.00 | £4.00 | £4.00per litre | £2.00 | |
 Diet Coke Cola 330ml Can↓ 70p less at Asda (multibuy) → | Sainsbury's | 1 × 330ml | £1.45 | — | £1.45 | £4.39 | £4.39per litre | £1.45 | |
 Diet Coke 330ml↓ 70p less at Asda (multibuy) → | Tesco | 1 × 330ml | £1.45 | — | £1.45 | £4.39 | £4.39per litre | £1.45 | |
 Diet Coke Bottles 4 x 250ml✓ Same price at Sainsbury's | Morrisons | 4 × 250ml | £4.80 | — | £1.20 | £4.80 | £4.80per litre | £4.80 · £1.20 each | |
 Diet Coke Cola 4 x 250ml Glass Bottles✓ Same price at Morrisons | Sainsbury's | 4 × 250ml | £4.80 | — | £1.20 | £4.80 | £4.80per litre | £4.80 · £1.20 each |
Diet Coke at a glance
We track 66 Diet Coke lines across 4 supermarkets; 30 are on offer this week, and 17 of those need a Clubcard or Nectar card.
Of the 19 Diet Coke products sold at more than one of them, the cheapest (or joint cheapest) is Morrisons on 11, Asda on 9, Tesco on 8 and Sainsbury's on 7.
Bigger isn't cheaper: at Asda, Diet Coke Cola 500ml Bottle is £3.70 per litre against £2.27 for Diet Coke Cola 330ml Can (when you buy 2). That is 63% more per litre for the same drink in a bigger size.
Best value by volume: Diet Coke Cola 2L Bottle at Asda, £0.75 per litre after the deal.
Biggest cut: Diet Coke Cola 330ml Can at Asda, £1.34 → £0.75 when you buy 2 (44% off).
| Shop | Lines | On offer | Cheapest £/litre |
|---|---|---|---|
| Sainsbury's | 19 | 8 | £0.75 |
| Morrisons | 17 | 7 | £0.75 |
| Asda | 15 | 6 | £0.75 |
| Tesco | 15 | 9 | £0.75 |
Same drink, different price
Diet Coke Cola 2L Bottle is £0.75 per litre at Asda. The same drink in Diet Coke Cola 330ml Can at Sainsbury's is £4.39 per litre — 5.9× more for what is, once you pour it, identical. Pack size is doing that, not the product.