The bundles and the math
The long-running US web store lineup is 400 Robux for $4.99, 800 for $9.99, 1,700 for $19.99, 4,500 for $49.99 and 10,000 for $99.99. Dollars per Robux improves with size: the 400 pack lands near $0.0125 per Robux, while the 10,000 pack drops under $0.01 — less than half the unit cost of the smallest pack. Premium subscribers also receive monthly Robux stipends as part of the membership.
Buying versus earning
Purchased Robux can be spent anywhere, but only earned Robux (from gamepasses, products, engagement payouts and item sales) qualifies for the DevEx cash-out program. That distinction matters for planning: a creator buying 10,000 Robux for advertising cannot later cash those same Robux out.
Practical buying rules
Never buy the smallest pack twice when one larger pack covers the need — the per-unit gap is real. Watch for promotional bonus packs around events, and treat marketplace-limited items as separate purchases from plain Robux top-ups since their prices float.
