ETACalc is a Excel-based purpose-built tool designed for mariners who need accurate, fast, and practical voyage timing estimates. Whether you are planning fuel-efficient passages, comparing alternative speeds, or working out a reliable clock-change schedule, ETACalc simplifies the process of calculating Estimated Time of Arrival (ETA) and Required Speed.
Why ETACalc?
Traditional spreadsheet calculators or manual methods often miss critical adjustments: time zones, International Date Line crossing, or speed restrictions in coastal zones. ETACalc brings these factors together in one streamlined tool, tailored for real-world navigation needs.
⚓ Key Features of ETACalc
- ⏱️ ETA calculation across a speed range (10–21 kts) – instantly see how arrival time changes with speed.
- 🌍 Set departure and arrival time zones – get ETA in local or UTC time.
- 🕰️ Clock adjustment schedule – calculates how many hours to advance/retard, with or without International Date Line crossing.
- 🚦 Multiple speed limit zones (up to 4) – adjust ETA considering required speed for restricted areas.
- 🛡️ Safety margin in hours – add extra buffer for weather or operational delays and assess time-loss for slow down at speed limit zones.
- ⚙️ RPM assessment – estimate propeller RPM from pitch and slip for a given speed.
👨✈️ Who is ETACalc for?
ETACalc is designed for:
- 🚢 Ship Masters – quickly work out ETA and required speed for passage planning and reporting.
- 🛳️ Navigators – prepare clock adjustment schedules and anticipate date line effects.
- ⚙️ Engineers – assess required RPM and fuel consumption accordingly.
🔒 Fully Offline – No Installation Needed
- 📂 Excel-based – runs directly in Microsoft Excel, no extra software.
- 🌐 Works completely offline – no internet connection required at sea.
- 🖥️ No installation – just open the file, start calculating.
- ⚡ Lightweight & portable – carry it on any laptop or USB stick.
💰 Pricing
Includes:
- ✅ Full access to all features
- 🔁 All updates for free
🎁 Interested? Request a free trial version to test it onboard.
📩 Contact & Purchase
Have questions or want to purchase? Please contact us:
- 📧 Email: seaxls.com@gmail.com
- 💬 Telegram