Postage math
Why your acbuy spreadsheet weight guess ≠ your invoice
Cells in an acbuy spreadsheet might list “~900g” for planning. Carriers bill on packed weight and sometimes volumetric equivalents after foam, bubble, and double boxing are applied.
Estimated vs rehearsed
Estimates help you compare two jackets. Rehearsal inside ACBuy tells you what actually ships—especially for shoes with thick toe boxes or electronics with odd shapes.
Volumetric sting
Airlines care how much air your parcel displaces. A light but huge box can cost more than a dense small one. If a row warns “ships volumetric,” believe it and rehearse early.
Practical habits
- Rehearse before you pick premium air lines.
- Combine only after every SKU clears QC.
- Expect refunds to wallet—not instant card credits—when postage over-collects.
Numbers here are educational. Your contract is with ACBuy + the carrier you select at checkout.