Copenhagen to Rostock Sea Distance Calculator

Calculate the exact nautical distance from Copenhagen, Denmark to Rostock, Germany. Plan your maritime journey with our professional route calculator.

Distance: 100.6 nm; nautical miles
Under Sail: 20 hours; at 5 knots
Under Power: 10 hours; at 10 knots
Best Time: May-September; Typical Sailing Season

Distance follows a sea-lane route. Sailing times are estimates at fixed cruising speeds and vary with vessel, weather, and currents.

Interactive Route Map

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Distance: 100.6 nautical miles

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This map shows the direct sea route from Copenhagen to Rostock. The actual sailing path may vary based on weather conditions and navigation requirements.

Passage details

This is a near-direct coastal passage: the navigable route runs 5% longer than the 96 nm direct line, holding a steady south-southeast course. It is an international crossing between two countries.

Sea distance: 100.6 nm (186.3 km)
Direct line: 95.8 nm5% longer
Great-circle bearing: 189° (south)
Geographic extent: 1.6° × 0.6°
Crossing: Cross-border · Same region
From: Copenhagen (Denmark) 55.6761, 12.5683
To: Rostock (Germany) 54.1000, 12.1333
Route basis: Sea-lane route

Passage timeEstimated passage time by cruising speed
Cruising speed	Duration
5 kn	20 hours
8 kn	13 hours
10 kn	10 hours
12 kn	8 hours

Distance follows a sea-lane route generated from marine traffic lanes; passage times are computed at fixed cruising speeds.

Read the methodology — How we calculate sea distances

Last reviewed 2026-06-17

About Copenhagen to Rostock Route

The maritime route from Copenhagen to Rostock is a day-passage international passage connecting two major commercial ports in the Northern Europe region. Mariners on this leg typically prepare for North Sea gales and short steep seas in winter.

This route runs within the same maritime region, connecting Copenhagen in Denmark with Rostock in Germany.

Navigation Tips

•On this day-passage international crossing in the Northern Europe region, prepare for North Sea gales and short steep seas in winter, particularly in peak season.
•For a day-passage route, plan fuel and provisioning around the Northern Europe region — calculate consumption with our tool.
•Verify port-entry requirements at both ends of this international route within the same maritime region before you depart.
•Check safety gear suited to Northern Europe conditions before a day-passage passage — life rafts, EPIRB, and current charts.
•Carry passports, vessel documents, and crew lists matched to this international route within the same maritime region.

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Frequently Asked Questions

How far is it from Copenhagen to Rostock by sea?

The sea distance from Copenhagen to Rostock is approximately 100.6 nautical miles — a day-passage passage in Northern Europe.

How long does it take to sail from Copenhagen to Rostock?

A day-passage within the same maritime region crossing of 100.6 nautical miles typically takes 10 hours – 20 hours, depending on vessel and weather.

What's the best time to sail from Copenhagen to Rostock?

The best time for this route in Northern Europe is May-September, when conditions are most favourable; expect North Sea gales and short steep seas in winter outside that window.

Plan Your Perfect Maritime Journey

Use our advanced calculator above to customize your route, add waypoints, calculate fuel costs, and share your journey plan with crew members.

Plan another route with our Sea Distance Calculator Navigation Guide