When does dimensional weight matter most?

DIM weight matters most for large, lightweight packages. If the box takes up a lot of truck or aircraft space, billable weight can exceed actual scale weight.

Should I use divisor 139 or 166?

Use your carrier contract first. If no custom contract applies, 139 is the common default for many parcel services, while 166 is often used in select programs.

Do I round each dimension or only the DIM result?

Carriers often require rounding package dimensions before calculation. This calculator rounds the dimensional weight result upward to a whole unit.

Why does metric mode use 5000 or 6000 divisors?

Metric divisors are unit-adjusted equivalents of imperial divisor policies. 5000 and 6000 are common metric divisor baselines.

Can DIM weight be lower than actual weight?

Yes. If your package is dense, actual weight will be higher and becomes the billable weight.

DIM Weight Calculator - Shipping Label Maker

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DIM Calculator FAQ

Practical billing and divisor guidance to avoid underestimating shipping costs.

It matters most when boxes are large but light. Those shipments consume space, so carrier pricing may use dimensional weight instead of scale weight.

Always follow your carrier contract first. If you are unsure, 139 is the safer default in many domestic parcel workflows.

Carriers often require dimension rounding first, then DIM weight rounding up. This tool rounds dimensional weight upward for billable comparison.

Those are common metric policy divisors that correspond to carrier DIM formulas in cm/kg workflows.

Yes. In that case, actual weight is billed. Billable weight is always the larger of actual and dimensional values.

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DIM Calculator FAQ

When does dimensional weight matter most?

Should I use divisor 139 or 166?

Do I round dimensions or just the final DIM value?

Why does metric mode use 5000 or 6000?

Can DIM weight be lower than actual weight?