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Two marine & boating tools, side-by-side. See which fits your task.
Marine & Boating
Calculate shaft alignment tolerances from shaft length and diameter.
Open Shaft AlignMarine & Boating
Estimate tide height between high and low water using the rule of twelfths.
Open Tide PredYour specific task is calculate shaft alignment tolerances from shaft length and diameter. Open the page, drop your input, get the result — typically under a second.
Your goal is estimate tide height between high and low water using the rule of twelfths. Same approach: paste in, get the result, move on. No account, no upload.
Both tools live in the same category, so the choice depends on the exact subtask. Shaft Align focuses on calculate shaft alignment tolerances from shaft length and diameter; Tide Pred focuses on estimate tide height between high and low water using the rule of twelfths. Try whichever description matches your goal more closely — they're both free.
Yes — both tools are free for unlimited personal use. The Pro plan unlocks higher limits and batch features but the core functionality stays free forever.
Absolutely. Many users chain multiple tools together — process a file with one, then feed the result into another. Nothing is uploaded, so chaining is essentially instant.
No. Both Shaft Align and Tide Pred work without signup. We only ask for an email if you decide to subscribe to a paid plan.