Tide Signal Tools
Voyage ETA Calculator
Estimate sea time, sea ETA, practical distance, average daily run and optional bunker cost. Only voyage distance and average speed are required.
Voyage Inputs
Required fields: distance and speed. Everything else is optional.
Optional departure time
Optional fuel and bunker estimate
Quick presets
Voyage Result
Sea time appears immediately after distance and speed.
Enter distance and speed to calculate the voyage estimate.
Speed Scenario Table
Compare sea time and optional fuel impact across nearby speeds.
| Speed | Sea Time | Sea ETA | Fuel | Bunker Cost | Cost / NM |
|---|---|---|---|---|---|
| Enter distance and speed to generate scenarios. | |||||
Maritime Converter
Convert nautical miles, knots, metric tons, barrels, cubic metres and bunker-related values.
Open Maritime ConverterVoyage Margin Calculator
Estimate freight, bunker cost, voyage expenses and commercial voyage margin.
Open Voyage Margin CalculatorPort Delays
Understand how waiting time, congestion and berth delays can become commercial voyage risk.
Read Port Delay GuideVoyage ETA Calculator for Maritime Planning
The Tide Signal Voyage ETA Calculator helps estimate sailing time, sea ETA, practical voyage distance, average daily run and optional fuel exposure from a simple set of maritime inputs. Only voyage distance and average speed are required, making the tool useful for quick checks during voyage planning, chartering review, operational updates and maritime study.
How the Voyage ETA Calculation Works
The basic calculation uses voyage distance in nautical miles and average vessel speed in knots. Because one knot equals one nautical mile per hour, the tool calculates sea time by dividing practical voyage distance by average speed. A weather or routing allowance can be added as a percentage to increase the practical sailing distance.
Sea Time vs Sea ETA
Sea time shows the estimated duration of the sea passage. Sea ETA is shown only when a departure date and time are entered. This keeps the calculator flexible: users can calculate a voyage duration without entering dates, or add a departure time when they need an estimated arrival window.
Weather and Routing Allowance
Weather, routing changes, traffic separation schemes, speed restrictions and operational routing decisions can increase the practical sailing distance. The weather allowance field allows users to add a simple percentage to the voyage distance for a more conservative estimate.
Fuel, Bunker Cost and Speed Scenarios
Fuel and bunker calculations are optional. If daily consumption is entered, the calculator estimates total fuel consumption over the calculated sea time. If bunker price is also entered, the tool estimates total bunker cost and fuel cost per nautical mile. The speed scenario table helps compare nearby speeds and shows how speed can affect time, fuel and cost.
Why Port Waiting Is Not Included
This calculator focuses on sea passage ETA and practical sailing distance. Port waiting, congestion, berth availability, pilotage delays and operational restrictions should be assessed separately, because they depend on local port conditions, terminal instructions, charterparty context and commercial arrangements.
Calculation Disclaimer
This Voyage ETA Calculator is intended for indicative maritime calculations only. It does not replace official passage planning, charterparty terms, noon reports, vessel performance data, weather routing, port instructions, bunker delivery notes or professional operational review. Official voyage planning should always follow approved company procedures, navigational publications and vessel-specific data.
Voyage ETA Calculator FAQ
What inputs are required?
Only voyage distance in nautical miles and average speed in knots are required. Departure time, weather allowance, fuel consumption and bunker price are optional.
Can I calculate sea time without a departure date?
Yes. The calculator will show sea time, practical distance and average daily run without a departure date. Sea ETA appears only when departure date and time are entered.
Does the calculator include port waiting time?
No. This version focuses on sea passage ETA and practical sailing distance. Port waiting, congestion and berth delays should be assessed separately.
How does the weather allowance work?
The weather allowance increases the voyage distance by a selected percentage. For example, a 1,000 NM voyage with a 5% allowance is calculated as 1,050 NM.
Can the tool estimate fuel and bunker cost?
Yes. If daily consumption is entered, the calculator estimates total fuel consumption. If bunker price is also entered, it estimates total bunker cost and fuel cost per nautical mile.
Is this suitable for official voyage planning?
No. It is an indicative tool. Official voyage planning should always use approved passage plans, company procedures, weather routing, navigational publications and vessel data.
