Math

Count significant figures, round written numbers, and calculate using the correct sig-fig rule for each operation.

Convert a fraction or mixed number to a percent, see decimal form, and follow the steps clearly.

Find the midpoint of two coordinate-plane endpoints. Enter x and y values or paste two ordered pairs to see the work.

Calculate normal distribution probabilities, percentiles, z-scores, and cutoff values for below, above, between, outside, top, and bottom questions.

Calculate the standard error of a mean from sample SD and size or raw data, with an optional confidence interval.

Calculate a p-value from z, t, chi-square, F, or Pearson r and match the probability area to your alternative hypothesis.

Convert a fraction, mixed number, whole number, or finite decimal to an exact decimal and rounded decimal.

Convert terminating and parenthetical repeating decimals into exact reduced fractions, mixed numbers, and optional nearby fractions.

Calculate a weighted average from matching values and weights, or calculate a course grade from weighted categories.

Find percent increase, decrease, or no change from two values, or apply a stated percent change to a starting value.