Cruise Days Calculator
Split a cruise into sea days and port days.
Quick answer: enter your details below and click Calculate Cruise Days — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
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Enter your details below.
How to use
- Enter the cruise length in nights.
- Enter the number of port days.
- Click Calculate Cruise Days for the split.
About this tool
A cruise length is nights plus port days, and this calculator separates the two so you can plan shore excursions and onboard time. Sea days are the nights minus port days, roughly, since embarkation and disembarkation days blur the edges. Confirm the itinerary for exact port calls.
Frequently asked questions
Are embarkation days port days?
Not exactly. Embarkation and disembarkation days are partial days, so the split is approximate rather than exact.
Should I book excursions in advance?
For popular ports, yes. Independent tours can be cheaper, but confirm return times against the ship's departure.