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Box Volume and Weight Calculator

Calculate packed box volume and measured weight independently, with outer dimensions, whole-box rounding and a separate space allowance.

MoveDayPlan Editorial Updated

Your move

Range: 0–10,000 boxes

Range: 0–30 ft

Range: 0–30 ft

Range: 0–30 ft

Range: 0–1,000 lb

Range: 0–100 %

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Choose inputs that match your quote or inventory

Measure the outside of a closed packed box in ft. The familiar 18 × 18 × 16 in example is 1.5 × 1.5 × 1.333333 ft, or 3 cu ft. Weigh a representative packed box rather than guessing pounds from volume. For a mixed shipment, calculate each box group separately and sum the raw volumes and weights.

Box volume = ceil(count) × outer length × width × height; packed mass = ceil(count) × measured lb per box

Worked scenario — replace these assumptions

Conditional example inputs, October 22, 2026
Input assumptionExample value
Identical packed boxes; fractions round up 20 boxes
Outer packed length 1.5 ft
Outer packed width 1.5 ft
Outer packed height 1.3333333333333333 ft
Measured packed weight per box 25 lb
Additional space for gaps 10 %
Results from the displayed formula; money is USD
Calculated resultExample output
Volume with separate gap allowance 66 cu ft
Outer box volume without gaps 60 cu ft
Total measured packed weight 500 lb
Whole boxes 20 boxes

Limits and rounding

Outer dimensions include packaging; mass is entered independently including contents and packaging. A gap allowance affects volume only. Repeat for different box sizes then sum. Does not determine whether boxes stack safely, fit a doorway or comply with payload. Zero dimensions intentionally yield zero volume, not proof of a usable load.

Why does zero volume sometimes show weight?

Volume and mass are independent inputs. A missing dimension can produce zero geometry while a measured weight remains nonzero. Correct the measurement before using the result. Neither a small volume nor a low total weight proves that the boxes can be stacked, carried or loaded safely.

Are the default prices or quantities verified for my move?

No. They illustrate the calculation. Replace them with your written quote, measured inventory and applicable terms. Save the input values with your planning worksheet so another person can reproduce the result.

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