Math

Find percent increase or decrease, apply a known percent change, or calculate the starting value before a change.

Calculate net square footage from added and excluded sections, then estimate flooring cartons using waste and carton coverage.

Solve a right triangle from sides or angle inputs. Get missing sides, acute angles, area, and perimeter with clear checks.

Add, subtract, multiply, divide, compare, convert, and simplify fractions and mixed numbers with clear exact and decimal results.

Calculate common probabilities for two events, including and, or, neither, only one, and conditional probability.

Paste numbers to get mean, median, mode, quartiles, variance, standard deviation, outliers, and a frequency table fast.

Calculate mean, median, mode, range, count, sum, min, and max from a pasted number list with a cleaned sorted-data check.

Calculate permutations and combinations with or without repetition, plus a small listing preview to check your counting model.

Convert raw values, z-scores, percentiles, and normal probabilities with clear left-tail, right-tail, and between-values results.

Calculate confidence intervals for a mean or proportion with t, Wald, or Wilson methods and clear result notes.