Developer Exchange – Help and Information Page - Roblox Support
https://en.help.roblox.com/hc/en-us/articles/13061189551124-Developer-Exchange-Help-and-Information-Page
WebRates. The following exchange rates will apply to DevEx. Please note that for anyone who has earned Robux prior to March 1, 2017, each rate below might apply to a different part of your holdings. New Rate. $.0035/R$ (which comes out to $105 USD for 30,000 Robux). This rate applies to all Robux earned on or after March 1, 2017.
DA: 35 PA: 46 MOZ Rank: 55