Yulduz Zaripova ✓ Verified expert

Free equilateral triangle calculator. Enter side, height, area, or perimeter to solve the rest. Area formula A = (√3/4)a² with height, radii, and examples.

Free pyramid volume calculator. Solve square, rectangular, or regular polygon base pyramids. Pyramid volume formula V = ⅓ × base area × height with examples.

Free area of a rectangle calculator. Enter any two values to solve area, perimeter, sides, or diagonal instantly. Rectangle area formula A = a × b explained.

Square root calculator with steps. Get the exact radical and decimal for any number, plus cube roots, fractions, and negative roots. √72 = 6√2 ≈ 8.4853.

Free test grade calculator. Enter questions wrong or your score to get the percentage and letter grade, plus how many you can miss for an A, B, or C.

Percentile calculator with steps. Find the value at any percentile, or the percentile rank of a number. 25th percentile of 45–90 is 56.25. Free solver.

Free point slope form calculator. Enter a point and slope or two points to get point slope, slope intercept, and standard form with steps.

Free scatter plot maker. Paste your X and Y data to plot points, add a line of best fit, and get the correlation r and R squared instantly.

Confidence interval calculator with steps. Enter your mean, SD, and sample size to get the 95% CI, margin of error, and critical value, using t or z correctly.

Free log calculator finds log base 10, base 2, or any custom base with step-by-step solutions. Solve exact log values and doubling-time problems fast.

Antilog calculator finds the inverse log in base 10 or e. See the antilog formula, worked examples (1.5, -1, 2, 2.303) and a full antilog value table.

Free covariance calculator with step-by-step solution. Enter X and Y values for sample or population covariance, mean deviations, and worked examples.

Free one-way ANOVA calculator. Enter your groups to get the F statistic, p-value, and a full ANOVA table with step-by-step working. Worked examples included.

Free degrees of freedom calculator finds df for t-tests, chi square, ANOVA & regression. Every formula, step-by-step, plus a full df reference table.

Linear regression calculator finds y = mx + b, slope, intercept, r and R2 from your data. See worked examples and how to do linear regression by hand.

Free quadratic regression calculator finds the y = ax² + bx + c equation and R² from your data, with full step-by-step working and worked examples.

Free 5 number summary calculator with steps. Find min, Q1, median, Q3, max, then build a box plot. Solved examples for any dataset.

Coefficient of variation calculator finds CV % from your data with mean, standard deviation, and full step-by-step working. Sample or population, free.

Outlier calculator finds Q1, Q3, IQR and the upper and lower boundaries using the 1.5 IQR rule. Enter your data set and detect outliers in seconds.

Free hypothesis testing calculator for one-sample mean tests. Get the test statistic, critical value, p-value, and a clear reject or accept H0 decision with steps.

Chi square calculator with steps. Get the χ² statistic, degrees of freedom, p value, and the expected frequency for every cell, for goodness of fit or independence.

Free standard deviation calculator with steps. Find sample or population SD, mean, and variance instantly. See the full worked solution for any data set.

Free sig fig calculator counts significant figures, rounds to any number of sig figs, and solves multiplication and addition with correct rounding. See steps.

Find the mean, median, mode, and range of any data set with full steps and worked examples. Free calculator with a sorted table and clear solution for each answer.