Shipping weight calculator

A guess and a calculation look alike until money is on the line. One minute with the shipping weight calculator replaces an evening of second-guessing.

Read the pitfalls section even if the figure looks right. They are drawn from situations people in fact run into, so you can map your own case onto them.

The point of this calculator

Shipping weight calculator turns packaging and logistics from guesswork into concrete R numbers. Avoid air — fill must be tight, not loose.

Formulas: box volume = L×W×H (m³ or cm³), dim weight = volume / DIM factor (commonly 5000 or 6000 cm³/kg for air, 4000 for ground), pallet = 120×80 or 120×100 cm × height, load capacity varies by carrier. For textiles, vacuum bags shrink volume 50–70%.

Whether computing pallet load, dimensional weight for a courier, or total landed cost for a shipment — the tool gives exact numbers for supplier and customer negotiations. Typical visitors are users in Johannesburg, Cape Town, Durban and Pretoria comparing offers or checking a bill, so the worked examples below use achievable local values rather than abstract numbers.

Inputs in, answer out

Third: for pallets — forgetting the pallet board itself (~20 kg) in capacity. Pallets: EUR pallet (120×80) is the EU standard; US uses 48"×40".

Second: ignoring dunnage (5–15% added weight). Classic: sizing box by actual weight without DIM. Consolidate — 2 parcels to one customer beat separate shipments.

Design product so the pack fits under the DIM threshold (near-cube proportions have the best DIM/weight ratio). Fourth: for cross-border — missing duty, VAT, insurance.

The equation and its logic

At DIM 5000, dim weight is 4.8 kg — the courier charges on 4.8, not 2. Packaging and logistics are a hidden cost usually ignored until a courier bill doubles expectation. Example: a 30×30×7.5 cm box with actual weight 2 kg has 0.024 m³ = 24,000 cm³.

For SMBs: invariably EUR. Use before negotiating with a courier (real cost vs sticker price), when designing a new product (optimal box and dunnage), when consolidating shipments (min total cost), or when choosing pallet config for warehouse/export. Difference is 140% of expected — precisely where small packaging changes win big.

When guessing stops being enough

Shipping weight calculator hands back control — compute before you ship, optimise boxes, negotiate rates on real numbers. Custom pallets are cheaper if you're making thousands but hard to reuse/return. EUR pallet (120×80×14.4 cm) is accepted EU-wide and easy to ship. Start by checking the input fields rather than the final number.

Who this is for

• Currency & format: South African rand (ZAR, R).
• Local notes: Amounts use rand, metric units and SARS defaults where applicable.
• Units of measure: Fully metric.
• Electrical supply: 230 V / 50 Hz, Types D, M and N plugs. Load-shedding still occasionally scheduled.
• VAT / sales tax: VAT is 15% on most goods and services. Basic foods (brown bread, rice, maize meal, dry beans, etc.) are zero-rated. Compulsory registration above R1 million turnover.

Fine points that matter

Every figure above applies to South Africa specifically and is reviewed when the rules change. How this calculation applies in South Africa: The values entered here are Length, Width, Height (cm), Actual weight (kg), Divisor (cm³/kg).

South African costs move with tariffs and levies, so Shipping weight calculator uses SARS-aligned rates and rand pricing.

Common slip-ups

That means the output can be used directly with an accountant, lender or employer in South Africa without converting anything. Shipping weight calculator applies EU or US standards. Amounts use rand, metric units and SARS defaults where applicable.

Couriers sell space by volume, not weight — a feather in a large box takes room that could carry 30 kg of bricks.

The point of it all

That is really all there is to it. The logic doesn't age; only the inputs change.