FREE SHIPPING TOOL
Calculate dimensional weight and compare it against actual weight. Use common DIM factors such as 139, 166, 194 or 200 to estimate billable weight before quoting or shipping.
Compare actual weight vs dimensional weight
Always verify the correct divisor with the carrier or rate agreement.
DIM weight, also called dimensional weight or volumetric weight, is a pricing weight based on package size. Carriers use it because large lightweight packages take up space even when they do not weigh much.
Many parcel, express and air freight services compare actual weight with dimensional weight. The higher number becomes the billable weight used for pricing.
For inches:
Carriers usually round dimensional weight up. For centimeters, convert to inches or use the calculator above.
Large boxes can be charged by dimensional weight instead of scale weight.
Air cargo often uses volumetric or chargeable weight because space is limited.
Right-sized packaging can reduce billable weight and shipping cost.
DIM checks help avoid surprise charges before giving customers a quote.
The divisor is set by your carrier, service and contract — there is no universal value. As a planning guide: 166 is the standard US domestic parcel divisor (UPS and FedEx Ground/Home Delivery) and is mathematically the same as the IATA air-freight volumetric divisor of 6000 cm³ per kg. 139 is used for most express and international parcel services (UPS, FedEx and DHL express products) and equals 5000 cm³ per kg. USPS uses 166 for larger Priority Mail parcels. LTL and freight contracts may use 194, 200 or a negotiated divisor. This calculator converts everything to inches and pounds internally, so the same divisor values work whether you enter inches/cm and lbs/kg. When money depends on the answer, confirm the divisor in your carrier tariff or rate agreement.
Actual weight is the scale weight. DIM weight is calculated from package dimensions. Many carriers charge whichever is higher.
The DIM factor is the divisor used in the formula. A lower divisor creates a higher dimensional weight, which can increase the billable weight.
No. DIM factors vary by carrier, service, country, contract and shipment type. Always check the carrier tariff or rate agreement.
Use smaller packaging, remove empty space, consolidate smartly and compare services. Packaging design can matter as much as weight.