Convert length, mass, time, temperature, pressure, energy, power, speed, area, volume, force, frequency, angle, amount of substance, and molar concentration. Private and instant.
Convert to many targets
Need Unit Conversion guide? Read our blog guide here.
Easily create, edit, and format mathematical equations online for documents, blogs, and educational use.
Open →Paste or upload CSV to generate clean, responsive HTML table code with auto-detect delimiter, header toggle, sort, filter, paginate, transpose, sticky header, and one-click copy or download. Private, in-browser.
Open →Compute confidence intervals for means and proportions in seconds. Auto z or t for one-sample means, Wilson or Agresti-Coull for proportions, Welch or pooled for two means, and Newcombe or Wald for two proportions. Paste raw data to bootstrap, plan sample size for a target margin, preview a mini chart, then copy results, download CSV, or share a tiny link. Private in your browser.
Open →Convert percentages to letter grades and compute weighted averages across categories. Drop lowest scores, run what-if finals, calculate the required score to hit a target, and estimate GPA. Import/Export CSV or JSON. Private, in-browser.
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