Printable Tide Clearance Calculator
This one-page Letter landscape worksheet is for boaters, skippers, and anyone checking under-keel clearance before moving through shallow water. It includes columns for Location, Charted depth, Tide height, Draught, Safety margin, Clearance, and OK?, with an example row like Harbour bar and all values kept in the same unit. The sheet uses the formula Clearance = charted depth + tide height − draught.
Free printable · PDF
- 2 pages
- US Letter, landscape — choose “Fit to page” for A4
- PDF, 54 KB
Free for personal, family and classroom use.
Fill in each location with the depth from the chart, the expected tide height, and your vessel draught. Add a safety margin, then compare the clearance result to decide if the crossing is acceptable. Use it for planning a route, checking a berth, or recording tidal conditions for the day.
Good for
- Check under-keel clearance before departure
- Compare tide height against vessel draught
- Record safe passage for shallow locations
Tip: Print landscape and keep one copy with your chart notes for quick route checks.
4 files · PDF, DOCX, XLSX
Get every sheet: Tide Planning Worksheets
This sheet plus 3 more in one download, with the editable Word and Excel files. Printable tide height worksheet with rule-of-twelfths table, an under-keel clearance calculator (Excel), a coastal walk and fishing tide log, and a tide terms reference card.
$5.00 USD, one-time 4 files · about $1.25 each
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