Average Speed of an Ocean-Going Freighter

The typical service speed of a modern **container ship** (Panamax to ULCV) is **15–20 knots** (28–37 km/h, 17–23 mph). This "design speed" balances fuel consumption, schedule reliability, and engine wear.

Speed Regimes

• Eco / Slow Steaming: 12–15 knots (22–28 km/h) — standard since 2008 fuel crisis; saves 30–50% fuel; adds days to voyage.
• Normal / Design Speed: 18–22 knots — pre-2008 norm; now used for tight schedules, perishables.
• Maximum: 24–26 knots — rarely used; exponential fuel curve.

By Ship Type

• **Bulk carriers / Tankers:** 13–15 knots (laden).
• **Ro-Ro / Car carriers:** 18–20 knots.
• **Reefers (refrigerated):** 20–22 knots.
• **Cruise ships:** 20–24 knots.

Factors Affecting Speed

Weather, currents, hull fouling, load factor, charter party terms, bunker prices, emissions regulations (IMO CII, EEXI). "Virtual arrival" and just-in-time port coordination optimize speed profiles.

For comparison: 20 knots ≈ highway speed (37 km/h). But a ship at 20 knots burns 150–300 tons of fuel/day.