Free weighted mean calculator. Calculate weighted averages, grade point averages (GPA), portfolio returns, and survey distributions with dynamic rows.
Weighted Average Calculator — Calculate Weighted Mean & College GPA
Calculate weighted averages, college GPA, and semester grade averages free online. Dynamic values and weights table with step-by-step math.
Vector Dot Product Calculator | Angle Between Vectors & Norms
Calculate algebraic dot product, Euclidean magnitudes, scalar projection, and enclosed angle θ in 2D and 3D space.
Vector Cross Product Calculator | u × v, Normal Vector & Area
Calculate 3D vector cross product A × B, orthogonal normal vector, and enclosed parallelogram surface area.
Variance Calculator – Free Sample (s²) & Population (σ²) Estimator
Calculate sample variance (s²) and population variance (σ²) with deviation steps.
Uniform Distribution Calculator – Continuous & Discrete Probability
Calculate continuous and discrete rectangular uniform probabilities, interval slicing, and variance.
Triangle Side Calculator – Law of Sines & Cosines SSS, SAS, ASA Solver
Solve missing triangle sides, angles, perimeter, and area using the Law of Sines and Law of Cosines for SSS, SAS, ASA, AAS.
TF-IDF Weight & Cosine Similarity Calculator
Calculate Term Frequency-Inverse Document Frequency (TF-IDF) weights and document cosine similarity. Analyze text corpora with scikit-learn and BM25 smoothing formulas.
T-Test Calculator – Free One-Sample, Independent & Paired Student’s t-Test
Perform one-sample, two-sample independent, and paired Student’s t-tests.
T-Score Calculator — Student’s t-Distribution & Hypothesis Testing
Free t-score calculator. Compute the Student