01
Seller supply
Digital Shipping Scale
Weigh packages before purchasing postage and reduce unexpected shipping-cost differences.
Use it when: Sellers who buy postage by the package's actual weight
View Shipping Scale on AmazonDimensional Weight Calculator
Carriers bill by whichever is greater, actual weight or dimensional weight. A big light box can cost more than a small heavy one. Enter your box dimensions, actual weight, and carrier divisor to see your billable weight, whether DIM is costing you, and how much you save with smaller packaging.
Best for
Make the next pricing or planning decision with context
Test how shipping, fulfillment, or package choices change the economics of your business offer. It covers DIM weight for UPS, FedEx, and USPS — find whether your package bills by actual weight or dimensional weight and see shipping cost impact.
Instant calculations · Editable fee assumptions · Export-ready results
Inputs
Values update results instantly. Adjust fee assumptions to match your seller dashboard.
Your figures are saved in this browser on this device.
Dimensions
Longest side in inches.
Second side in inches.
Third side in inches.
Weight
Scale weight in pounds.
Carrier
Carrier's dimensional divisor.
Only if custom selected.
Rates
USD
Carrier rate for 1 lb in your zone.
USD
Cost per extra pound beyond first.
Results
Live estimates based on your inputs and editable fee assumptions.
Cubic inches
720
L × W × H volume.
Dimensional weight (raw)
5.18
Cubic / divisor, before round up.
Dimensional weight (billed)
6
Rounded up to whole lb.
Actual weight
4
Scale weight.
Billable weight
6
Max of actual and DIM.
Bills by
DIM weight
Actual vs DIM.
Estimated shipping cost
$22.50
Based on billable weight.
DIM surcharge vs actual
$4.00
Extra due to DIM.
Surcharge %
21.6%
% increase from actual-only cost.
What this means
720 cu in / 139 = 5.18 → 6 lbs DIM. Billable 6 lbs by DIM weight. Cost $22.50 vs $18.50 actual-only, surcharge $4.00 (21.6%).
Actual vs dimensional weight
Interactive breakdown of fees, costs, and remaining profit.
Distribution
- Actual weight$4.0025.0%
- DIM weight$6.0037.5%
- Billable$6.0037.5%
Total $16.00 · 3 segments · interactive
Line-item breakdown
Dollar amounts, share of revenue, and visual proportion.
- Cubic inches
- 720
- DIM divisor
- 139
- DIM weight raw
- 5.18
- DIM weight billed
- 6
- Actual weight
- 4
- Billable weight
- 6
- Cost at actual weight
- $18.50
- Cost at billable weight
- $22.50
- DIM surcharge
- $4.00
- Surcharge %
- 21.6%
1850.0%
2250.0%
400.0%
Assumptions used
- • 720 cu in / 139 = 5.18
- • Bills by DIM weight, rounded up rule applied
Recommended next step
Put this result to work
These suggestions follow the decision behind this calculator, so you can review a practical next move without losing the assumptions you just tested.
Amazon recommendations
Verify package weight and size
A measured, protected parcel gives dimensional-weight and carrier scenarios a more useful starting point.
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02
Seller workflow
Scotch Heavy-Duty Packing Tape with Dispenser
Heavy-duty packing tape with a built-in dispenser for sealing parcels at the packing station.
Use it when: You are sealing orders regularly and want a dedicated tool at the packing station.
View Scotch Packing Tape on AmazonCompare the full seller-supply lineup and the calculator paths each item supports.
Compare Amazon seller suppliesResult ready
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Explore General BusinessDimensional Weight Calculator
Generated 9/16/2026, 7:46:13 AM · Currency USD
Inputs
- Length (inches): 12
- Width (inches): 10
- Height (inches): 6
- Actual weight (lbs): 4
- Carrier DIM divisor: ups_fedex_2024
- Custom DIM divisor: 139
- Base rate for 1 lb: 12.5
- Additional per lb rate: 2
Results
- Cubic inches: 720
- DIM divisor: 139
- DIM weight raw: 5.18
- DIM weight billed: 6
- Actual weight: 4
- Billable weight: 6
- Cost at actual weight: $18.50
- Cost at billable weight: $22.50
- DIM surcharge: $4.00
- Surcharge %: 21.6%
Interpretation
720 cu in / 139 = 5.18 → 6 lbs DIM. Billable 6 lbs by DIM weight. Cost $22.50 vs $18.50 actual-only, surcharge $4.00 (21.6%).
How it works
Methodology & formulas
This calculator is transparent by design. Review the steps and formulas so you can trust the estimate and adjust assumptions when your dashboard differs.
Calculation steps
- 1Calculate cubicInches = length × width × height.
- 2Resolve divisor from carrier selection or custom input.
- 3Dimensional raw = cubic / divisor.
- 4Dimensional billed = ceil(raw).
- 5Billable = max(actualWeight, dimensionalBilled).
- 6Cost = base + (billable-1)*additional.
- 7Surcharge = costAtBillable - costAtActual.
Formulas
- Cubic inches = L × W × H
- DIM weight = cubic / divisor (round up)
- Billable = max(actual, DIM)
- Shipping = base + (billable-1) × perLb
Important assumptions
- DIM weight = (L×W×H) / divisor, rounded up to next whole pound (UPS/FedEx rule).
- Billable weight = max(actual, DIM).
- Shipping cost = baseRate + (billable-1)*additionalRate, min baseRate.
- Divisor 139 for UPS and FedEx domestic daily rates, 166 for USPS Priority cubic exception.
- Zone and service surcharges not auto-included; reflect them in base rate input.
Sources & review
Know what this estimate is built on
This calculator is intentionally platform-agnostic, so it does not attach a platform fee URL.
Calculator model reviewed: August 9, 2026
Official references
No single official fee page is attached here. The model keeps these inputs editable so you can use the terms that apply to your situation.
Use the current terms
This model uses editable planning assumptions. Confirm tax, payment, financing, or operating terms with the relevant provider, official authority, or adviser for your situation.
Defaults are editable estimates. Match them to your current account, provider statement, official authority, lender, or adviser before making a pricing or investment decision.
Calculator model reviewed: August 9, 2026. This date covers the page and calculator guidance, not a guarantee that every live platform rate or term was re-audited on that date.
Worked example
12x10x6 box at 4 lbs actual
Box 720 cubic inches. UPS divisor 139. Actual weight 4 lbs. Base $12.50 + $2 per extra lb.
720/139=5.18 → DIM 6 lbs. Billable 6 lbs (DIM wins over 4 actual). Cost = $12.50 + (6-1)*$2 = $22.50. Actual-only cost would be $12.50 + (4-1)*$2 = $18.50. DIM adds $4.00 (21.6% surcharge). Switching to 9x7x4 box 252/139=2 lbs billable would save $8 dropping to actual weight.
FAQ
Common questions
Related guides
Read the guide behind the number
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