2500 Robux is about Ksh 18.7 using the rate shown in the source I found for Robux-to-Kenyan shilling conversion.

Quick math

  • 1 Robux โ‰ˆ Ksh 0.007665.
  • 2500 Robux ร— 0.007665 = Ksh 19.16.

Note

Rates can shift a bit depending on the platform and fees, so the actual amount may be slightly higher or lower.