Free general-purpose calculators for professionals: percentage, average, ratio, proportion, time duration, date difference, business days, time zones and rounding. No sign-up required.
Everyday professional calculations, done accurately and free: percentages, averages, ratios, proportions, time and date arithmetic, time-zone conversion, and significant-figure rounding. These are the small, repeatable calculations that slow real work down when done by hand.
Each calculator is a free WebApplication with no sign-up and no tracking of your inputs.
Built for: Analysts · Operations professionals · Students · Anyone doing daily professional calculation
100 free professional tools · no sign-up · no tracking of your inputs