6371 Microsoft Rewards points is not quite enough for 400 Robux. The current Roblox reward listing shown in Microsoft’s Roblox rewards page is 400 Robux for 6,750 points , so 6,371 points would leave you 379 points short.

Rough estimate

Using that listed rate, 6,371 points is about 377 Robux worth on a straight points-to-Robux basis, but Microsoft usually only offers fixed reward tiers rather than exact conversions.

What to expect

  • 400 Robux: 6,750 points.
  • Your points: 6,371.
  • Short by: 379 points.

Simple takeaway

You’d need a little more grinding before redeeming the 400 Robux option.