Fast, Private Online Tools

No sign-up. No tracking. Just tools that work — instantly, in your browser.

Percentage X% of Y, what %, change BMI Body Mass Index, metric & imperial Age Exact age in years, months, days Word Counter Words, chars, sentences, read time Date Calculator Difference, add/subtract days

Mass kg, lb, oz, g, stone, tons Length m, km, mi, ft, in, yd Temperature °C, °F, K Time sec, min, hr, day, week, year Speed m/s, km/h, mph, knots Volume L, mL, gal, cup, fl oz Area m², km², acre, hectare, ft² Data B, KB, MB, GB, TB, KiB Energy J, kJ, cal, kcal, kWh, BTU

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Instant Results

All calculations happen in your browser. No server round-trips, no loading spinners. Type and get results immediately.

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100% Private

No accounts, no tracking, no data collection. Your inputs never leave your device. Ever.

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Works Everywhere

Designed for every screen size — phone, tablet, or desktop. Looks clean, loads fast, works offline.