SeaETA

Marine transit time calculator

Approximate sea route planner for shipping and voyage estimates.

Voyage inputs

Choose ports, speed, and route options.

Estimate

Type a port or city, then pick a suggestion from the list.

Type a port or city, then pick a suggestion from the list.

knots

Editable planning speed. Supported range: 0.1–80 knots.

Add a date to calculate an approximate ETA.

Select both locations from the suggestions to calculate a route.

Try an example route

Route map

No route loaded

2D view

Calculate a route to show it here.

Popular route examples

Open a common route or browse the full route library.

View all routes →

Rotterdam to Singapore

View estimate →

Los Angeles to Jakarta

View estimate →

New York to Perth

View estimate →

Oslo to New York

View estimate →

Shanghai to Los Angeles

View estimate →

Houston to Rotterdam

View estimate →

Frequently asked questions

How does SeaETA estimate transit time?+

SeaETA combines approximate sea route distance with vessel speed in knots to estimate transit duration and ETA for planning workflows.

Is SeaETA suitable for navigation or voyage execution?+

No. SeaETA is for planning and visualization only. Route output is approximate and should not be used for navigation or official voyage execution.

Can I compare different route assumptions such as avoiding Suez?+

Yes. The calculator can compare approximate route outcomes, including scenarios that avoid the Suez area, to support chartering and voyage planning discussions.