Last updated: 23 October 2026

Most container ships today cruise at about 14 to 20 knots, roughly 16 to 23 miles per hour. They’re capable of more, but fuel costs and emissions rules mean most ships sail slower than their designers intended. Here’s how fast container ships go, and why.

What is a knot? One knot is one nautical mile per hour, about 1.15 mph or 1.85 km/h.

Why do container ships go slower than they can?

Slow steaming

Since the late 2000s, many shipping lines have adopted slow steaming, reducing speed to save fuel. Fuel use rises steeply with speed, so a small reduction makes a big difference. Read how much fuel a container ship uses.

Emissions rules

International rules on ships’ carbon intensity encourage lines to sail slower and use more efficient ships.

Schedule reliability

Lines often adjust speed to arrive on time for their slot at the next port.

Speeds of other ship types

How long do voyages take?

What does the speed feel like on board?

At sea, 18 knots feels calm and steady. A huge container ship moves through the water smoothly, and the main sensation is the gentle vibration of the engine. You’ll notice speed changes when the ship slows to pick up a pilot near port.

Learn more: how big is a container ship, how many containers fit on a ship et how to track a ship.

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