Shop by dock, not by the word Roomba
iRobot distinguishes bag types for different Clean Base and AutoEmpty docks. Its support page lists compatibility by equipment family and identifies newer models that use a different bag. Before ordering, find the full robot-and-dock bundle name and the replacement pack identifier. If a secondhand listing omits the dock model, ask for a label photo rather than guessing.
Calculate a cost per compatible bag
Divide delivered pack price by the number of bags in the pack. Compare only packs that explicitly fit your dock. Keep filters or other consumables on a separate line so you do not mistake an inexpensive bag for a low-maintenance bundle.
Use a range rather than a promise
A hypothetical $24 pack of six is $4 per bag. If your household uses one bag every four to eight weeks, a simple 52-week estimate gives about 7–13 bags per year, or $28–$52 in bags consumed. Buying only six-packs would mean paying for two or three packs in that period, with leftovers. This is a worked budget example, not a price quote or measured lifespan.
Replace the estimate with your own log
Record the date you insert the first bag and when your dock actually needs a replacement, following the manufacturer’s directions. Use the next two intervals to refine the budget. Note unusual cleaning loads such as shedding season. If choosing between two bundles, compare first-year cash paid and unused supplies separately.
Related: Robot Vacuum Multi-Floor Maps: Verify the Right Floor Before Cleaning.
Primary documentation checked November 6, 2026: iRobot’s dock bag compatibility guidance. The examples are illustrative, not hands-on tests. Links are informational.
