Helsinki to Tallinn Sea Distance Calculator

Calculate the exact nautical distance from Helsinki, Finland to Tallinn, Estonia. Plan your maritime journey with our professional route calculator.

Distance: 45.2 nm; nautical miles
Under Sail: 9 hours; at 5 knots
Under Power: 5 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: 45.2 nautical miles

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This map shows the direct sea route from Helsinki to Tallinn. 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 2% longer than the 44 nm direct line, on a gently curving course, its heading easing from south-southwest to south. It is an international crossing between two countries.

Sea distance: 45.2 nm (83.7 km)
Direct line: 44.4 nm2% longer
Great-circle bearing: 187° (south)
Geographic extent: 0.7° × 0.2°
Crossing: Cross-border · Same region
From: Helsinki (Finland) 60.1699, 24.9384
To: Tallinn (Estonia) 59.4370, 24.7536
Route basis: Sea-lane route

Passage timeEstimated passage time by cruising speed
Cruising speed	Duration
5 kn	9 hours
8 kn	6 hours
10 kn	5 hours
12 kn	4 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 Helsinki to Tallinn Route

Linking Helsinki and Tallinn, this brief day-sail cross-border crossing between two major harbours sits in the Northern Europe region — a passage shaped by persistent low cloud and reduced visibility on shoulder-season passages.

The lane links Helsinki (Finland) and Tallinn (Estonia), between neighbouring ports of the same region.

Navigation Tips

•A brief day-sail cross-border passage in the Northern Europe region typically requires planning for persistent low cloud and reduced visibility on shoulder-season passages.
•A brief day-sail leg in Northern Europe benefits from waypoint planning and verified fuel availability.
•Confirm operating hours and clearance procedures for this cross-border crossing between neighbouring ports of the same region, since rules vary by port.
•Verify that emergency equipment matches the demands of a brief day-sail leg in Northern Europe.
•Documentation requirements differ for cross-border passages between neighbouring ports of the same region; verify cruising permits in advance.

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Frequently Asked Questions

How far is it from Helsinki to Tallinn by sea?

Approximately 45.2 nautical miles separate Helsinki and Tallinn by sea, making this a brief day-sail leg in Northern Europe.

How long does it take to sail from Helsinki to Tallinn?

Expect about 5 hours – 9 hours for a brief day-sail run of 45.2 nautical miles between neighbouring ports of the same region.

What's the best time to sail from Helsinki to Tallinn?

Peak sailing season here is May-September; year-round, Northern Europe routes contend with persistent low cloud and reduced visibility on shoulder-season passages.

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