Tools that work. Explained.
Free online calculators, converters, and developer tools — every result comes with the formula, step-by-step breakdown, and a worked example.
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Finance & money
Loans, interest, tax estimates, currency, and shopping math.
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Health & fitness
Body metrics, nutrition, and fitness calculators (coming soon).
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Math & numbers
Percentages, ratios, and general math helpers.
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Date & time
Time zones, dates, and durations.
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Units & conversion
Units, file sizes, and number bases.
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Text & writing
Word count, transforms, and text utilities (coming soon).
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Developer tools
Base64, hashing, UUIDs, JSON, and more.
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Design & color
Colors, CSS helpers, and in-browser image tools.
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SEO & marketing
Meta previews and marketing utilities (coming soon).
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Random & generators
Random values and mock data (coming soon).
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Everyday & lifestyle
Everyday and academic calculators (coming soon).
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