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Precision update: Significant Figures & Scientific Notation counts sig figs, normalizes scientific notation, and compares textbook versus final rounding rules with shareable How it’s calculated logs.
New optics: Lens & Mirror Equation walks through 1/f = 1/dₒ + 1/dᵢ with a live How it's calculated panel, ray diagram, CSV export, and shareable URLs for physics labs.
New electronics: RC / RL / RLC calculator tracks RC/RL time constants, divider gain, and series RLC resonance with full How it's calculated steps, CSV export, and shareable URLs.
New chemistry: Partial pressure & gas mixing documents Dalton's law, two-tank mixing, wet gas corrections, and van der Waals comparisons with CSV export and shareable URLs.
New worksheets: Worksheet & Quiz Auto-Generator outputs deterministic seeds, How it's calculated steps, CSV export, and print-ready PDFs for algebra classes.
Dimensional analysis: Dimensional analysis & unit consistency checker expands compound units, verifies equation consistency, and builds Buckingham Π groups with shareable How it’s calculated logs.
Latest physics: Simple Harmonic Motion (SHM) simulator unifies analytic, Euler-Cromer, and RK4 solutions with a How it's calculated log, shareable URLs, plots, and CSV exports for classroom use.
Latest addition: Error propagation (with steps) brings gradient×covariance, correlation matrices, templates, and seeded Monte Carlo validation together in one multilingual workspace.
New arrival: Sampling & Bootstrap — CLT Explorer brings seeded sampling, percentile/t/normal confidence intervals, CLT histograms, CSV export, and a full How it's calculated walkthrough to one shareable workspace.
Now available: Truth Table & Logic Evaluator builds paged truth tables, canonical DNF/CNF, and Karnaugh or Quine–McCluskey simplifications with shareable URLs, CSV export, and How it’s calculated logs.
Brand-new: Probability Simulator runs reproducible coin, weighted dice, and roulette experiments with theory vs empirical comparisons, Wilson 95% intervals, convergence charts, EV/house edge, CSV/LaTeX exports, and full How it's calculated steps.
Fresh release: CI & Hypothesis Test Wizard guides one- and two-sample mean or proportion analyses with Wilson/Newcombe intervals, live p-value shading, and shareable URLs.
New release: Riemann Sums Explorer plots left/right rectangles, trapezoids, and Simpson arcs, logs every step, compares an adaptive Simpson reference integral, and exports CSV, LaTeX, and shareable URLs.
Fresh drop: Distributions Pack Calculator brings binomial, Poisson, Student’s t, and chi-square together with PMF/PDF, CDF, quantiles, exact intervals, canvas visuals, CSV, LaTeX, and share links for class transparency.
New release: First-order ODEs (separable & linear) visualises the slope field, Simpson integrals, integrating factor, numeric inversion, RK4 error, CSV export, and shareable URLs in one workspace.
Check out the new Function Transformations Explorer to see how y = a·f(b(x−h)) + v shifts, scales, and reflects classic functions with step-by-step explanations.
New: Vector Calculator with step-by-step logs for dot/cross, projection, angle, areas, and the triple product, plus a 2D diagram.
Fresh release: Eigenvalues & Eigenvectors Explorer covering 2x2 and 3x3 matrices with rational-root checks, QR iteration, RREF eigenvectors, residuals, and a diagonalizability verdict.
We also launched the Limits Explorer to show numeric L'Hôpital iterations, one-sided sampling, and ready-to-share CSV logs.
Latest addition: Taylor & Maclaurin Series Explorer pairs symbolic derivatives with a least-squares fallback, plots f and P_n together, and exports error summaries, LaTeX, CSV, and shareable URLs.
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Finance & money
Plan loans, project compound growth, convert currencies, and split bills.
Unit converters
Convert everyday units quickly for study, travel, and DIY projects.
Date & time
Track schedules, deadlines, and logs with dedicated date-time tools.
Math & statistics
Solve common classroom and analytics problems without spreadsheets.
Education & study
Plan GPA scenarios, track coursework, and set targets for final exams.
Life & health
Track personal indicators while keeping privacy and control offline.
Cooking & kitchen
Convert recipe measurements, scale batches, and stay organised in the kitchen.