Free, no sign-up
Tools for the coast
Free calculators and calendars, no sign-up, for the everyday questions on the coast: how high the water will be, how big the tide is, when the fish should bite or how many knots force 6 is.
Calculators
- Tide height at a given timeHow high the water will be at the time you pick, whether it is rising or falling and how long until high tide.Open ›
- Tide coefficient calculatorThe tide coefficient for any place and day, or from the tidal range, with the 20–120 scale explained.Open ›
- Solunar calendarMajor and minor periods and the activity rating for every day of the month.Open ›
- Nautical unit converterKnots, Beaufort, mph, fathoms, nautical miles, inHg and °F, with tables.Open ›
Sun and moon
Downloads and printables
- Yearly tide table as a PDFOn any place’s tides page, open the full-year tide table and tap “Download PDF”: twelve letter or A4 pages, one per month, with high and low tides, coefficient, sun and moon.Open ›
- Printable 2026 moon calendarThe whole year on a single page, with the moon for every day and the main phases.Open ›
- Moon phase images in SVG and PNGEight illustrations with a transparent background for class, websites and notes, under CC BY 4.0.Open ›