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Calculators
Count the number of derangements (permutations with no fixed points).
Open DerangementYour specific task is count the number of derangements (permutations with no fixed points). Open the page, drop your input, get the result — typically under a second.
Your goal is calculate dew point from temperature and relative humidity. 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. Derangement focuses on count the number of derangements (permutations with no fixed points); Dew Point focuses on calculate dew point from temperature and relative humidity. 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 Derangement and Dew Point work without signup. We only ask for an email if you decide to subscribe to a paid plan.