College Student

Perform matrix addition, subtraction, multiplication, transpose, and determinant in one free online tool. Supports any matrix size for linear algebra problems.

Calculate the determinant of any square matrix online for free. Supports 2×2, 3×3, 4×4, and larger matrices with instant results for linear algebra.

Dot product calculator for 2D and 3D vectors. Computes scalar product, angle between vectors, and magnitudes — essential for linear algebra and physics.

Cramer's Rule calculator for 2×2 and 3×3 linear systems. Solve using determinants with step-by-step results showing D, Dx, Dy, and Dz values instantly.

T test calculator for two independent means using Welch's method. Find the t statistic, degrees of freedom, and two-tailed p-value instantly.

One-way ANOVA calculator compares independent group means and returns the F-statistic, degrees of freedom, and sums of squares instantly.

Confidence interval calculator for sample means. Enter summary stats or raw data to get CI bounds, margin of error, and SE at 90%, 95%, or 99%.

P-value calculator for Z, T, F, and Chi-square tests: enter a test statistic and degrees of freedom to get the exact p-value and significance verdict.

Z-score calculator: find how many standard deviations a value is from the mean. Enter raw score, mean, and standard deviation to get z-score and interpretation.

Chi-square test calculator finds the statistic, degrees of freedom, and p-value for a contingency table to assess categorical association instantly.

Linear regression calculator finds the line of best fit, slope, intercept, correlation, R-squared, and predictions from paired data instantly.

Sample size calculator using Cochran's formula. Enter confidence level, margin of error, and proportion to get the minimum sample size for reliable surveys.

Calculate your GPA with the standard 4.0 scale. Enter courses, letter grades, and credit hours for an instant weighted Grade Point Average result.

Semester grade calculator finds weighted GPA, total credits, and quality points from course grades and credit hours for clear academic planning.

Calculate GPA from letter or numerical grades with credit-hour weighting. Supports mixed grading systems and shows per-course letter grade conversions.