Math Calculators

Critical Value Calculator helps you find z, chi-square, F, and T critical values for one-tailed and two-tailed hypothesis tests with accurate results.

Calculate degrees of freedom instantly with our free Degrees of Freedom Calculator. Learn the formula and get accurate results in seconds.

Use our Linear Regression Calculator to find the line of best fit, generate the regression equation, and analyze data trends instantly.

Solve quadratic equations instantly with our Quadratic Formula Calculator. Get accurate roots, step-by-step solutions, and fast results online.

Quadratic regression calculator that finds y = ax² + bx + c from your data, with R² and every step shown. Free, no signup, works with any paired data set.

Sum of squares calculator with the SS formula: SS = Σ(x − x̄)². Enter your data to get the mean, each squared deviation, and the total, with steps shown.

5 number summary calculator with steps. Enter your data to find the minimum, Q1, median, Q3, and maximum, plus the IQR and outlier boundaries.

Variance calculator for population and sample data. Enter your values to get the variance, mean, and standard deviation with every step shown. Free, no signup.

Coefficient of variation calculator with steps. Enter your data to get the CV, mean, and standard deviation, using the formula CV = (SD ÷ mean) × 100.

Outlier calculator using the 1.5 IQR rule. Enter your data to find Q1, Q3, IQR, and the upper and lower outlier boundaries, with every step shown.