Net: 9 lb
Twelve bags at 12 oz each is 144 oz, which is 9 lb of coffee. This is the figure printed on the retail bag and the figure your inventory system holds.
Four weights, one box
Net weight vs gross weight
Net is the contents. Tare is the packaging. Gross is what the scale reads with both on it, and gross is the only one of the three a carrier has any interest in. Then it gets compared against a fourth figure derived from the carton's size, and the larger of those two prices the label.
Terms defined onceCarrier rules citedRead 2026-07-28
The scale sees one number
Nobody at a carrier hub separates the contents from the carton. Whatever crosses the belt is the weight of record.
The four weights, in the order they matter
Three of these come out of packaging and product labeling. The fourth is invented by carriers and is the one that ends up on the invoice. People conflate them because two of them are usually close together, and then a quote comes in short.
| Term | What it counts | Who asks for it |
|---|---|---|
| Net weight | The goods alone. Twelve jars of honey and nothing else. | Buyers, product labels, customs value lines, inventory systems |
| Tare weight | The empty container and everything that goes in it besides the goods: carton, foam, air pillows, tape, and on a freight shipment the pallet and the wrap. | Warehouses reconciling counts, and anyone auditing a freight bill |
| Gross weight | Net plus tare. What a scale reads when the sealed parcel goes on it. | Every carrier, on every shipment, without exception |
| Billable weight | The greater of gross weight and the size-based figure a carrier derives from the carton's outer dimensions. | The rating engine that prices your label |
Net and gross diverge by whatever your packing habits weigh. On a dense parcel that gap is a few ounces. On a fragile item packed properly, tare can be a third of the shipment, and it is the reason a seller who quotes from a product spec sheet always under-buys the label.
A worked case, no carrier involved yet
Picture twelve 12 oz bags of coffee going into one carton. The arithmetic below is an illustration rather than a captured shipment, but it is the arithmetic every rating engine performs.
Tare: 1.5 lb
A 14 by 12 by 10 in carton, the kraft paper around each bag, the tape, and the packing slip. Nothing here is coffee, and all of it rides on the scale.
Gross: 10.5 lb
Net plus tare. Round it up to 11 lb, because a carrier rounds a fraction of a pound upward rather than downward.
Now the size check. The carton is 1,680 cubic inches, and 1,680 divided by 139 is a little over 12, which rounds to 13 lb. That size-based figure beats the 11 lb scale reading, so the parcel prices as a 13 lb shipment even though only 9 lb of it is coffee. Four pounds of the invoice are cardboard, paper and air. The mechanics of the divisor, and a calculator for it, sit on our dimensional weight page.
What each carrier says it charges on
All three national carriers land in the same place by slightly different wording, and one of them gives small boxes an exemption the other two do not.
| Carrier | The stated rule | Source read 2026-07-28 |
|---|---|---|
| UPS | Size-based weight is described as "the amount of space a package occupies compared to its actual weight", used when a package is large relative to what it weighs. The divisor is 139 on daily rates and 166 on retail rates, and any fraction of a pound goes up to the next whole pound. | ups.com/us/en/support/shipping-support/shipping-dimensions-weight.page |
| FedEx | "For each shipment, you are charged based on the dimensional weight or actual weight of the package—whichever is greater." Divide by 139 for shipments inside the United States and Puerto Rico, after rounding each measurement to the nearest whole inch. | fedex.com/en-us/shipping/packaging/what-is-dimensional-weight.html |
| USPS | Domestic Mail Manual 123.1.3 applies the comparison only to parcels going to Zones 1 through 9 that exceed one cubic foot, 1,728 cubic inches. Above that line, divide by 139 and round up. Below it, the scale reading stands on its own. | pe.usps.com/text/dmm300/123.htm |
The coffee carton above lands just under the postal threshold at 1,680 cubic inches, which means the same box would rate at 11 lb through the Postal Service and 13 lb through the other two. That one-inch difference in carton height is worth more than most people's packing tape budget for a year.
Freight paperwork asks the question differently
Gross per handling unit
A bill of lading wants the weight of each piece as it will be lifted, pallet included. A skid that holds 900 lb of product and sits on a 45 lb wooden pallet is declared at 945 lb, not 900.
Tare drives the class
Density decides classification, and density is gross weight over the full cube of the wrapped load. Overbuild the pallet and you dilute your own density, which raises the class and the rate with it.
The scale settles it
Terminals reweigh. A declared figure that comes up short against a certified scale gets corrected on the invoice, and the correction rarely lands in your favor.
If the shipment is heading for a pallet rather than a carton, the numbers a carrier needs before it can price anything are set out on our freight quote checklist, and the density arithmetic has its own calculator.
Common questions
Which weight does a carrier charge on?
Gross weight, meaning the whole packed parcel as it sits on the scale, compared against the size-based figure for the same carton. Whichever of the two is larger becomes the billable weight and prices the label.
Is net weight ever used in parcel shipping?
Not by a domestic carrier. Net quantity belongs on the retail label and the packing list, and nothing at the counter or in the rating engine ever reads either one.
Does the pallet count toward a freight weight?
It does. A bill of lading asks for the gross weight of each handling unit, so the pallet, the slip sheet, the stretch wrap and the corner boards all belong in the number you declare.
What is tare weight?
Everything the receiver throws away after unpacking: carton, void fill, tape, dunnage, and on a freight shipment the pallet underneath. Gross minus net leaves you with it.
Why did the invoice come in heavier than my scale?
Two usual causes. The carton got measured and its size-based figure beat the scale reading, or the scale reading itself was rounded up to the next whole pound before rating.