Medium Diet Coke Price at McDonald's (2026)
A Medium Diet Coke at McDonald's in Australia is priced at A$6.4 as of October 2026.
A Medium Diet Coke® at McDonald's costs A$6.40 in Australia as of October 2026. That's about 2% below the typical McDonald's drink item — the 3rd-cheapest of 23 we track. It's available at around 25 McDonald's locations across Australia. Prices are sourced from delivery platforms and refreshed regularly. Check the full McDonald's menu or compare drink prices on MenuPriceToday.
How this compares in Drinks
23 items tracked| This item | A$6.40 |
| Drinks median | A$6.53 |
| Cheapest — Bottled Water 250mL | A$6.23 |
| Most expensive — Medium Strawberry Shake | A$8.65 |
| vs Drinks median | −2% |
Compare McDonald's prices across 20+ countries — Fast-Food Price Index →