The 200,000 metric tonne figure was derived from the deadweight tonnage, which is the weight of fuel and cargo a ship can carry, but excludes the weight of the

The 200,000 metric tonne figure was derived from the deadweight tonnage, which is the weight of fuel and cargo a ship can carry, but excludes the weight of the empty ship itself. Wikipedia doesn't list displacement (which is weight of the ship plus cargo) for the Ever Given, but empty weight of modern container ships is on the order of 10% of their capacity, so ignoring the ships empty weight isn't the worst approximation used.