Math tools — Page 2
150 focused tools, ready to use in your browser.
Hypergeometric Probability Calculator
Calculate successes in sampling without replacement from a finite population.
MathMean Confidence Interval — Known SD
Construct a two-sided interval for a population mean when the population standard deviation is known.
MathProportion Confidence Interval Calculator
Calculate a bounded Wilson score interval from a success count and sample size.
MathProportion Sample Size Calculator
Plan a simple-random proportion sample from confidence, margin, and an explicit anticipated proportion.
MathTwo-proportion A/B Test Calculator
Compare two independent success rates with an explicitly approximate two-sided pooled z test.
MathPearson and Spearman Correlation Calculator
Measure paired linear or rank association with explicit average ranks for ties.
MathChi-square Independence Calculator
Inspect a two-way count table with Pearson’s statistic, expected counts, and a conditional approximate p value.
MathPercentile Calculator
Compute specified percentiles of a finite sample using a named interpolation or rank convention.
MathMoving Average and EWMA Calculator
Smooth an ordered numeric series with full-window simple averages or a stated EWMA seed.
MathTrigonometric Functions Calculator
Evaluate a real trigonometric or inverse function with explicit degree/radian conventions and domain checks.
MathExact Rational Representation Workbench
Convert recurring decimals and fractions, or find a best bounded-denominator approximation on the same page.
MathFinite Difference Table Calculator
Build exact differences across a bounded observation list without inferring a unique sequence formula.
MathPolynomial Long Division Calculator
Divide exact plain-decimal coefficient polynomials and export quotient/remainder coefficients.
MathBracketed Polynomial Root Finder
Find one supported real root inside a supplied sign-change bracket and report its enclosure and residual.
MathAffine Coordinate Transform Composer
Apply ordered numeric2D translation, rotation, scaling or skew to a point table, with a guarded inverse mode.
MathBarycentric Coordinate Calculator
Find exact-grid triangle weights and classify supplied points as inside, on the boundary or outside.
MathPoint in Polygon Calculator
Classify query points against one validated simple planar polygon using exact-grid boundary and winding tests.
MathLine and Segment Intersection Calculator
Distinguish unique intersections, collinear overlaps, parallel lines and degenerate planar segments on a declared grid.
Math2D Convex Hull Calculator
Reduce a bounded point cloud to an ordered exact-grid convex boundary with a stated collinear policy.
MathCartesian Cylindrical and Spherical Coordinates
Convert a numeric3D point with explicit azimuth and spherical polar-inclination conventions.
MathDensity Mass and Volume Calculator
Solve one missing SI quantity in the density relationship with explicit zero and inverse states.
MathNewton Force Mass Acceleration Calculator
Solve one-dimensional net force, mass or acceleration in an explicit SI Newtonian model.
MathMechanical Energy Calculator
Calculate kinetic and reference-dependent gravitational energy from entered SI values.
MathEnergy Power and Time Calculator
Solve average power, energy or a positive elapsed time in consistent joule/watt/second units.
MathTorque and Lever Balance Calculator
Calculate planar torque magnitude or an opposing force for a simple perpendicular lever balance.
MathLinear Spring and Oscillator Calculator
Calculate ideal spring restoring force, stored energy and undamped oscillation period.
MathIdeal Thermal Mixing Calculator
Find a same-phase equilibrium temperature from supplied masses, heat capacities and Kelvin temperatures.
MathIdeal Gas Law Calculator
Solve pressure, volume, amount or absolute temperature in the entered ideal-gas SI state.
MathSeries RLC Impedance Calculator
Calculate series RLC reactance, impedance, phase and RMS current for an entered sinusoidal model.
MathLoaded Voltage Divider Calculator
Calculate an ideal divider output with an explicit optional resistance across its lower leg.
MathLED Series Resistor Scenario Calculator
Calculate a resistor for an entered LED drop/current scenario and verify current after optional E12 rounding.
MathFirst-order RC Filter Calculator
Find a single-pole RC cutoff and ideal unloaded gain/phase at an entered frequency.
MathResistor Color Code Workbench
Decode supported four/five-band resistance colors or encode an exactly representable nominal value.
MathIdeal Op-amp Gain Calculator
Calculate a fixed inverting/noninverting ideal gain and compare the unclipped output with user-entered bounds.
MathFree-space RF Link Budget Calculator
Reconcile user transmit/gain/loss assumptions under a declared far-field free-space model.
MathIncoherent Sound Level Combiner
Combine same-reference sound levels by adding their incoherent intensity ratios stably.
MathMolar Solution Dilution Calculator
Find an entered stock volume and ideal added solvent for a lower target molarity.
MathIdeal Pipe Flow and Head-loss Calculator
Calculate pipe velocity, Reynolds number and Darcy-Weisbach loss from explicit SI model properties.
MathSurface Coverage and Container Planner
Estimate net surface coverage, coats, user-entered waste and whole containers in one bounded workflow.
MathConstant Acceleration Motion Calculator
Calculate signed one-dimensional motion or enumerate nonnegative times that reach a given displacement.
MathIdeal Projectile Motion Calculator
Calculate a drag-free flight time, range, peak height and bounded sample trajectory under entered gravity.
MathFisher Exact2×2 Test Calculator
Compute a bounded fixed-margin Fisher exact probability with a named one- or two-sided alternative.
MathMcNemar Paired Binary Test Calculator
Analyze discordant outcomes in a matched binary table with exact or corrected approximate inference.
MathStandardized Mean Effect Size Calculator
Calculate signed pooled-SD Cohen d or exact-definition Hedges g from two independent numeric samples.
MathTwo-proportion Experiment Power Planner
Plan bounded independent group sizes or estimate fixed-horizon power under a stated normal-arcsine approximation.
MathIQR and MAD Outlier Review
Flag source indices using a named robust IQR or modified-z review rule without deleting data.
MathHistogram Bin and Frequency Calculator
Build a downloadable frequency distribution using manual edges or a named bounded bin rule.
MathBayes Theorem Calculator
Update an entered prior with two conditional likelihoods and display the evidence denominator.