We’re pleased to introduce Mariner GPS Tools, a free web app that brings together a growing collection of marine, navigation, and GPS calculators in one place.
Designed for sailors, boaters, navigators, pilots, road users, and outdoor enthusiasts, Mariner Tools provides practical tools for coordinate conversion, distance calculation, bearing calculation, travel time estimation, and speed conversion, all accessible from any modern web browser without installing an app.
The app is currently available in 15 languages and remembers your settings and recent inputs, making it faster and more convenient to use whenever you return.
Available Tools
✦ Coordinate Converter
Convert between Decimal Degrees (DD) and Degrees, Minutes, Seconds (DMS) formats. Useful for chart work, navigation, route planning, and sharing positions between different navigation systems.
✦ Distance Calculator
Calculate the distance between two positions using accurate geographic calculations. Ideal for passage planning, route analysis, and estimating journey lengths on land, sea, or air.
✦ Bearing Calculator
Determine the bearing between two coordinates, with support for traditional compass directions. Helpful for navigation, waypoint planning, and understanding direction of travel.
✦ Speed Converter
Quickly convert between:
- Knots
- Miles per hour (mph)
- Kilometres per hour (km/h)
- Metres per second (m/s)
- Feet per second (ft/s)
A useful reference for marine, aviation, automotive, and outdoor activities.
Built for Everyday Navigation
Mariner Tools is designed to be simple, fast, and accessible from any modern device. Whether you’re planning a sailing passage, calculating an ETA, converting coordinates, or checking distances between locations, the tools are available instantly in your browser.
Features include:
- Free to use
- Works on desktop, tablet, and mobile
- Available in 14 languages
- Remembers settings and recent inputs
- Multiple display themes, including Night Vision mode
- No account required
Try Mariner GPS Tools Today
The app is designed to be simple, fast, and accessible from any modern device. Open the website and start calculating distances, bearings, travel times, speed conversions, and GPS coordinates in seconds. We will continue to expand with additional marine, GPS, and navigation utilities over time.
If you have suggestions, spot an issue, or would like to see a particular calculator added, we’d love to hear from you. Get in touch.
