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Every other decision on this tool trades leftover against take rate — match the Buy Box, run Connect ads, offer 2-day. This one leaves the listing alone. The WFS fulfillment fee is a step function of the carton you ship: its longest, median and shortest sides, and its billable weight. A box that is half an inch over on one side pays a whole tier more on every unit, for as long as you sell it, and nothing on the listing says so.
What Seller Center will not tell you is which measurement is the expensive one. The default 19 × 13 × 7 in carton at 3 lb bills as Oversize at $9.20. It misses Standard on one thing only — the longest side, by 1.00 in. Repacked to 17.5 × 13 × 7 at 2.9 lb it is Standard at $5.35, a $3.85 drop per unit. After $0.35 to repack that is $3.50 a unit, or $420.00 across 120 units a month.
| Box | Sides (in) | Weight | Tier | Cu ft | Fulfillment fee |
|---|
Standard needs the longest side at or under 18 in, the median at or under 14 in, the shortest at or under 8 in, and weight at or under 20 lb. The three sides are sorted before they are checked, so it does not matter which field you typed each one into.
Only the fulfillment fee and the repack cost are compared here. Referral, cost of goods and inbound are identical on both sides of a repack, so folding them in would bury a $4 fee step inside a $20 ticket. Complementary to the unit leftover on the main calculator, to WFS vs seller fulfilled (who ships it at all), to aged leftover vs a removal (units already inbound), to 2-day vs WFS, to returns vs WFS, to hold vs match vs promo, and to Walmart Connect vs skip. The tier ceilings and fees here are illustrative defaults — replace them with the figures on your current Seller Center preview before acting on any of it.
The calculator is arithmetic, not advice. It does not recommend repacking, and it does not tell you a carton is safe to ship.
Only if it crosses a step. The WFS fulfillment fee is a step function of the longest, median and shortest sides and the billable weight, so shaving a carton that stays inside the same tier and weight band changes nothing. On the calculator defaults a 19 × 13 × 7 in carton at 3 lb bills as Oversize at $9.20. Repacked to 17.5 × 13 × 7 at 2.9 lb it is Standard at $5.35 — $3.85 less per unit. After $0.35 to repack that is $3.50 a unit, or $420.00 across 120 units a month. This page does the arithmetic from the measurements you enter; it does not publish Walmart's live fee schedule.
The page names each one separately. Standard requires the longest side at or under 18 in, the median at or under 14 in, the shortest at or under 8 in, and weight at or under 20 lb. The default 19 × 13 × 7 in carton misses on one thing only — the longest side, by 1.00 in. That is the sentence a fee preview cannot give you, because it shows a single number and not the constraint behind it. The sides are sorted before they are checked, so it does not matter which box you typed length into.
Three ways, and the page reports each rather than showing a $0.00 saving. A repack that stays in the same tier and band saves nothing, so the labour is a straight loss — shaving the default carton to 18.9 in is still Oversize and costs $42.00 a month. A repack that consolidates units and gains weight can cost more to fulfil, not less. And a real tier drop can still lose: at $5.00 a unit to repack, the $3.85 saving leaves you $1.15 a unit worse, or $138.00 a month. The break-even repack cost on the defaults is $3.85 a unit.