2.50 Australian dollars is roughly 130 Robux at the current buy-rate estimate of about A$0.019 per Robux, though Roblox gift-card pricing can vary a bit by region and purchase method.

Quick math

  • A$1 gets you about 52 Robux.
  • A$2.50 is therefore about 130 Robux.

Note on pricing

Some third-party converters show different estimates, but the standard purchase-rate estimate is the better one to use for “how many Robux do I get?”.

If you mean a Roblox gift card, the exact amount can differ depending on the product and any bonuses or fees.