Dimensional Weight Calculator
Carriers bill the greater of actual and dimensional weight. Enter your package size and weight to find the billable weight.
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139 = UPS/FedEx domestic (in/lb). 166 for some USPS.
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Dimensional weight = (L × W × H) ÷ DIM divisor. US domestic divisor is commonly 139 (in/lb); some services use 166. International and metric (cm/kg, divisor 5000) differ. Confirm your carrier's current divisor — it changes.
Understanding Dimensional Weight
Why carriers use DIM weight
A big, light box takes up truck space a small heavy box does not. Carriers charge the greater of actual weight and dimensional weight — (L×W×H)÷divisor — so bulky packaging costs you even when the item is light.
How to lower shipping cost
Use smaller packaging and the divisor works in your favor. Right-sizing boxes is one of the fastest ways to cut shipping spend, which directly improves the margin you have to price with.
Shipping and competitive pricing
Shipping cost is part of your true landed cost and your free-shipping math. Knowing it precisely — alongside competitor prices — lets you set prices and shipping thresholds that win without losing money.
Factor Shipping Into Competitive Pricing
Price Patrol monitors competitor prices so you can set prices and free-shipping thresholds that stay profitable after real shipping costs.
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