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Two marine & boating tools, side-by-side. See which fits your task.
Marine & Boating
Convert between knots, mph, and km/h for marine navigation.
Open Knot SpeedMarine & Boating
Reference for marine engines: inboard, outboard, sterndrive, and jet drive systems.
Open Marine EngineYour specific task is convert between knots, mph, and km/h for marine navigation. Open the page, drop your input, get the result — typically under a second.
Your goal is reference for marine engines: inboard, outboard, sterndrive, and jet drive systems. 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. Knot Speed focuses on convert between knots, mph, and km/h for marine navigation; Marine Engine focuses on reference for marine engines: inboard, outboard, sterndrive, and jet drive systems. 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 Knot Speed and Marine Engine work without signup. We only ask for an email if you decide to subscribe to a paid plan.