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Two marine & boating tools, side-by-side. See which fits your task.
Marine & Boating
Calculate fresh water tank capacity from crew size and voyage duration.
Open Fresh WaterMarine & Boating
Calculate holding tank size from crew count and pump-out interval.
Open Hold TankYour specific task is calculate fresh water tank capacity from crew size and voyage duration. Open the page, drop your input, get the result — typically under a second.
Your goal is calculate holding tank size from crew count and pump-out interval. 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. Fresh Water focuses on calculate fresh water tank capacity from crew size and voyage duration; Hold Tank focuses on calculate holding tank size from crew count and pump-out interval. 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 Fresh Water and Hold Tank work without signup. We only ask for an email if you decide to subscribe to a paid plan.