Helsinki to Turku Sea Distance Calculator

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

Distance: 147.7 nm; nautical miles
Under Sail: 30 hours; at 5 knots
Under Power: 15 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

Loading map...

Distance: 147.7 nautical miles

🧮 Open Interactive Calculator

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

Passage details

This is a markedly indirect coastal passage: the navigable route runs 82% longer than the 81 nm direct line, its heading turning from south-southwest to north.

Sea distance: 147.7 nm (273.5 km)
Direct line: 81.2 nm82% longer
Great-circle bearing: 283° (west-northwest)
Geographic extent: 0.8° × 2.7°
Crossing: Domestic · Same region
From: Helsinki (Finland) 60.1699, 24.9384
To: Turku (Finland) 60.4518, 22.2666
Route basis: Sea-lane route

Passage timeEstimated passage time by cruising speed
Cruising speed	Duration
5 kn	30 hours
8 kn	18 hours
10 kn	15 hours
12 kn	12 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 Turku Route

Linking Helsinki and Turku, this single-day crossing domestic crossing connecting a working port with a cruise destination 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 Turku (Finland), within the same maritime region.

Navigation Tips

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

More Routes from Helsinki

Continue from Turku

Frequently Asked Questions

How far is it from Helsinki to Turku by sea?

Approximately 147.7 nautical miles separate Helsinki and Turku by sea, making this a single-day crossing leg in Northern Europe.

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

Expect about 15 hours – 30 hours for a single-day crossing run of 147.7 nautical miles within the same maritime region.

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

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