Tare Weight in Shipping — What It Means and Why It Matters

If you have looked at a shipping container up close or reviewed a Bill of Lading, you have likely seen the term ‘tare weight’. It sounds technical, but it refers to a simple concept that is important for calculating cargo weight, complying with port regulations, and avoiding costly errors on your shipping documents.

Tare Weight Definition

Tare weight is the weight of the empty container itself — without any cargo inside. Every ISO shipping container has its tare weight stamped on the door. A standard 20ft dry container typically has a tare weight of approximately 2,200 kg. A 40ft container is typically around 3,700–4,000 kg.

The Three Key Weight Terms

• Tare Weight — The weight of the empty container alone. Stamped on the container door. Does not include cargo.
• Net Weight (Cargo Weight) — The weight of your cargo only, without the container.
• Gross Weight — The total weight of cargo + container combined. Gross Weight = Tare Weight + Net Weight (Cargo). This is the figure used for port and road weight compliance.

Why Tare Weight Matters for Kenya Shipments

• Road weight compliance — Mombasa port and road transport authorities enforce maximum gross weight limits on trucks. Knowing the container tare weight lets you calculate whether your loaded container is within legal road limits before it leaves the port.
• VGM (Verified Gross Mass) — Under the IMO SOLAS regulation (in force globally since 2016), shippers must declare a Verified Gross Mass (VGM) for every packed container. VGM = cargo weight + tare weight + packaging/dunnage. Incorrect VGM can result in cargo being held at port.
• Bill of Lading accuracy — Your Bill of Lading must show gross weight accurately. If gross weight exceeds the container’s maximum payload, the shipping line can refuse to load the container.

Container Weight Limits — Quick Reference

• 20ft Dry Container — Tare: ~2,200 kg | Max payload: ~28,000 kg | Max gross: ~30,400 kg
• 40ft Dry Container — Tare: ~3,700 kg | Max payload: ~26,500 kg | Max gross: ~30,400 kg
• 40ft High Cube — Tare: ~4,000 kg | Max payload: ~26,380 kg | Max gross: ~30,480 kg
• 20ft Reefer Container — Tare: ~3,080 kg | Max payload: ~27,400 kg | Max gross: ~30,480 kg

Note: exact tare weights vary by manufacturer and container age. Always check the tare plate on the container door before packing.