Marine Multi-leg Passage Calculator
Calculate constant-speed passage hours, optional fuel litres and a budget from your own leg burn rates and price.
A QUICK WALKTHROUGH
How to use this tool
- Add between 1 and 100 passage legs.
- Enter each leg distance in nautical miles and a positive constant speed in knots.
- Calculate each leg and the total hours, then copy or download the report. Fuel per leg = leg hours × entered L/h. Total fuel = sum of leg fuel. Budget = total L × entered price per L, in the entered currency. Leave price empty for fuel only.
Formula and units
Leg hours = nautical miles ÷ knots. Total hours = sum of leg hours. One knot equals one nautical mile per hour. Fuel per leg = leg hours × entered L/h. Total fuel = sum of leg fuel. Budget = total L × entered price per L, in the entered currency. Leave price empty for fuel only.
Scope
This is constant-speed arithmetic only. It does not account for wind, tide, currents, manoeuvring, stops, port conditions or navigation risks, and is not a passage safety assessment.
Local processing
Inputs stay in your browser. The report includes inputs, formulas and scope.
GOOD TO KNOW
Common questions
Does the total predict arrival or a safe route?
No. It sums supplied distances divided by constant speeds and includes no departure time, delays or route safety assessment.