Percentages, averages, regression, triangles, factoring and integrals, with step-by-step working you can follow.
Mean, median, mode, range, sum and geometric mean of any list of numbers.
Percent increase from old to new, or increase a number by any percent.
Percent change, percent difference and what percent X is of Y.
Slope, intercept, r, R², standard error and predictions, with a scatter plot.
Best fit line y = mx + b with steps, exact fractions and a residual table.
Solve SSS, SAS, ASA, AAS and SSA triangles, with a drawing to scale.
Count sig figs, round to N significant figures, and do sig fig arithmetic.
Convert to scientific, E and engineering notation, and calculate with powers of ten.
Factor polynomials with steps, or find the prime factors of any integer.
Antiderivatives and definite integrals, verified with a numeric cross-check.
Solve A:B = C:D, simplify ratios and split a total in any ratio.
a mod n with quotient and remainder, negative-number conventions and big integers.
Weighted mean of any values and weights, with each item's contribution.
LCM and GCF of any list of numbers, with prime factorization steps.
Every math tool shows how it reached the answer, not only the result. Use them to check homework, understand a method, or get a quick, exact figure. Where it matters, the tools use exact fractions and big-integer arithmetic so rounding does not creep in.