Math Tools
This category collects math calculators for common numeric problems such as percentages, ratios, averages, algebra, geometry, and other everyday calculations.
These tools are useful when you want a quick result for a single task without building the formula manually. They help with practical calculations used in school, work, shopping, planning, and general problem solving.
What these tools are useful for
Everyday calculations
Use math tools for discounts, markups, percentages, averages, ratios, simple comparisons, and other quick calculations that come up in daily life.
Study and practice
Some pages are useful for checking formulas, reviewing results, and solving structured math problems more quickly while studying or practicing.
Work and planning
Math calculators can help with estimates, numeric checks, measurement-based planning, and repeated business or project calculations where speed and consistency matter.
Browse math tools
Search the available tools below if you already know the type of calculation you need.
Percent Calculator
Calculate percent of a number (percentage). Useful for discounts, tax, tips, and quick math.
OpenSales Tax Calculator
Free sales tax calculator. Add or remove sales tax and see subtotal, tax, and total instantly.
OpenPercentage Change Calculator
Calculate percentage change between two numbers. Find percent increase or decrease instantly.
OpenAverage Calculator
Free average calculator. Compute mean (average), sum, count, min, max, and range from a list of numbers. Includes validation, result cards, and FAQ schema.
OpenPercentage Increase Calculator
Free percentage increase calculator. Calculate percent increase between two values instantly.
OpenPercentage Decrease Calculator
Free percentage decrease calculator. Calculate percent decrease between two values instantly.
OpenDiscount Calculator
Free discount calculator. Find final price, discount amount, and savings percentage with clear explanations and real use cases.
OpenFraction Calculator
Free fraction calculator. Add, subtract, multiply, divide fractions and mixed numbers with simplification and step-by-step results.
OpenRatio Calculator
Free ratio calculator. Simplify ratios, scale ratios to a target value, and compute proportions (A:B = C:D) instantly.
OpenProportion Calculator
Free proportion calculator. Solve A:B = C:D with cross multiplication. Find the missing value instantly with clear steps.
OpenMean / Median / Mode Calculator
Free mean, median, and mode calculator. Paste a list of numbers and get summary stats instantly (with validation and steps).
OpenPercentage Difference Calculator
Free percentage difference calculator. Compare two values without choosing a baseline. Shows absolute and percent difference.
OpenReverse Percentage Calculator
Free reverse percentage calculator. Find what percent Y is of X instantly.
OpenSquare Root Calculator
Free square root calculator. Compute √x with validation, unit-aware input help, result cards, and FAQ schema.
OpenExponent Calculator
Free exponent calculator. Compute powers (a^b), roots, and scientific notation with validation, result cards, and FAQ schema.
OpenLog Calculator
Free logarithm calculator. Compute log base 10, natural log (ln), or custom base logs with input validation and step explanation.
OpenGCD / LCM Calculator
Free GCD/LCM calculator. Find greatest common divisor and least common multiple for two or more integers with steps.
OpenScientific Calculator
Free scientific calculator with support for arithmetic, parentheses, powers, roots, trig, logs, constants, and accessible UX.
OpenStandard Deviation Calculator
Free standard deviation calculator for a list of numbers. Supports population and sample mode with mean, variance, and accessible UX.
OpenVariance Calculator
Free variance calculator for a list of numbers. Supports population and sample variance with mean, standard deviation, and accessible UX.
OpenPermutation and Combination Calculator
Free nPr and nCr calculator. Compute permutations and combinations with validation, formulas, result cards, and FAQ schema.
OpenFactorial Calculator
Calculate factorial (n!) instantly with validation, result cards, and large-number support.
OpenBinary Calculator
Add, subtract, multiply and divide binary numbers.
OpenHex Calculator
Calculate hexadecimal numbers with addition, subtraction, multiplication, and division. Includes validation, result cards, and FAQ schema.
OpenNumber Base Converter
Convert numbers between binary, decimal, and hexadecimal with validation and result cards.
OpenRandom Percentage Calculator
Generate a random percentage within a chosen range. Includes validation, accessible UX, result cards, quick stats, and FAQ schema.
OpenDistance Formula Calculator
Calculate the distance between two points in 2D using the distance formula. Includes validation, result cards, steps, and FAQ schema.
OpenSlope Calculator
Calculate slope between two points. Includes validation, undefined-slope handling, result cards, and FAQ schema.
OpenTriangle Area Calculator
Calculate the area of a triangle using base and height. Includes validation, result cards, unit labels, and FAQ schema.
OpenPythagorean Theorem Calculator
Solve a right triangle side using the Pythagorean theorem. Find a, b, or c with validation, result cards, and FAQ schema.
OpenCircle Area Calculator
Calculate the area of a circle using radius or diameter. Includes validation, unit UX, result cards, and FAQ schema.
OpenCircle Circumference Calculator
Calculate circle circumference using radius or diameter. Includes validation, unit UX, result cards, and FAQ schema.
OpenQuadratic Equation Calculator
Solve quadratic equations of the form ax² + bx + c = 0. Includes validation, discriminant, root type, result cards, and FAQ schema.
OpenMatrix Calculator
Add, subtract, or scalar-multiply matrices with validation, result cards, accessible input grids, and FAQ support.
OpenMatrix Multiplication
Multiply two matrices with validation, accessible matrix grids, result cards, and FAQ support.
OpenMatrix Determinant
Calculate the determinant of a square matrix with validation, result cards, and FAQ support.
OpenVector Calculator
Add, subtract, or scalar-multiply vectors with validation, result cards, and FAQ support.
OpenDot Product Calculator
Calculate the dot product of two vectors with validation, result cards, and FAQ support.
OpenCross Product Calculator
Calculate the 3D cross product of two vectors with validation, result cards, geometric interpretation, and FAQ support.
OpenLinear Equation Solver
Solve one-variable linear equations of the form ax + b = c with validation, result cards, and FAQ support.
OpenInequality Solver
Solve one-variable linear inequalities of the form ax + b ? c with validation, sign-flip handling, and FAQ support.
OpenLogarithm Base Calculator
Calculate log base b of x with validation, domain checks, result cards, and FAQ support.
OpenLog2 Calculator
Calculate base-2 logarithms with validation, domain checks, result cards, and FAQ support.
OpenLog10 Calculator
Calculate base-10 logarithms with validation, domain checks, result cards, and FAQ support.
OpenCube Root Calculator
Calculate cube roots for positive or negative values with validation, result cards, and FAQ support.
OpenNth Root Calculator
Calculate nth roots with validation, real-number domain checks, result cards, and FAQ support.
OpenAbsolute Value Calculator
Calculate the absolute value of a number with validation, sign classification, and FAQ support.
OpenPrime Number Checker
Check whether an integer is prime with validation, factor insight, and FAQ support.
OpenPrime Factorization
Factor an integer into prime factors with validation, exponent form, result cards, and FAQ support.
OpenRandom Prime Generator
Generate random prime numbers in a range with validation, multiple results, and FAQ support.
OpenModulo Calculator
Calculate the modulo of two integers with validation, quotient details, normalized result, and FAQ support.
OpenGeometric Mean Calculator
Calculate the geometric mean of positive numbers with validation, step details, and FAQ support.
OpenHarmonic Mean Calculator
Calculate the harmonic mean of positive numbers with validation, reciprocal steps, and FAQ support.
OpenRange Calculator
Calculate the range of a dataset with validation, sorted values, result cards, and FAQ support.
OpenIQR Calculator
Calculate the interquartile range (IQR) with quartiles, validation, sorted values, and FAQ support.
OpenCovariance Calculator
Calculate sample or population covariance for two datasets with validation, paired input checks, and FAQ support.
OpenCorrelation Calculator
Calculate Pearson correlation for two datasets with validation, paired input checks, and FAQ support.
OpenZ-Score Calculator
Calculate a z-score from a value, mean, and standard deviation with validation, interpretation, and FAQ support.
OpenNormal Distribution Calculator
Calculate normal distribution PDF, CDF, z-score, and tail probabilities with validation and result cards.
OpenBinomial Distribution Calculator
Calculate exact and cumulative binomial probabilities with validation, result cards, and FAQ schema.
OpenPoisson Distribution Calculator
Calculate exact and cumulative Poisson probabilities with validation, result cards, and FAQ schema.
OpenConfidence Interval Calculator
Calculate a confidence interval for a mean using sample mean, standard deviation, size, and confidence level.
OpenProbability Calculator
Calculate basic probability, complement probability, and percentage from favorable and total outcomes.
OpenOdds Calculator
Calculate odds in favor, odds against, probability, and percentage from favorable and unfavorable outcomes.
OpenSample Size Calculator
Estimate sample size for a proportion using confidence level, margin of error, expected proportion, and optional finite population correction.
OpenConfidence Level Calculator
Calculate two-sided confidence level from a z critical value, with tail areas and percentage form.
OpenT Test Calculator
Calculate a one-sample t statistic, degrees of freedom, and standard error from sample mean, hypothesized mean, sample SD, and sample size.
OpenChi Square Calculator
Calculate chi-square statistic for observed and expected values with validation, per-category contributions, and FAQ schema.
OpenANOVA Calculator
Calculate one-way ANOVA F statistic, sums of squares, mean squares, and group summaries from multiple groups.
OpenRegression Calculator
Calculate simple linear regression slope, intercept, correlation, and predicted y from x-y pairs.
OpenStandard Error Calculator
Calculate standard error from sample standard deviation and sample size with validation and result cards.
OpenPopulation Variance Calculator
Calculate population variance, mean, and population standard deviation from a dataset.
OpenSample Variance Calculator
Calculate sample variance, sample standard deviation, and mean from a dataset using n − 1.
OpenMedian Absolute Deviation Calculator
Calculate median absolute deviation (MAD), median, absolute deviations, and a robust spread summary from a dataset.
OpenQuartile Calculator
Calculate Q1, Q2, Q3, IQR, min, max, and sorted data from a numeric dataset.
OpenPercentile Calculator
Calculate a percentile value from numeric data using linear interpolation on the sorted dataset.
OpenSkewness Calculator
Calculate sample skewness, mean, standard deviation, and asymmetry summary from numeric data.
OpenKurtosis Calculator
Calculate sample excess kurtosis, mean, standard deviation, and tail/peakedness summary from numeric data.
OpenBayes Theorem Calculator
Calculate posterior probability using Bayes' theorem from prior probability, sensitivity, and false positive rate.
OpenProbability Density Calculator
Calculate normal distribution probability density from x, mean, and standard deviation.
OpenCumulative Distribution Calculator
Calculate the normal cumulative distribution value P(X ≤ x) from x, mean, and standard deviation.
OpenTriangle Perimeter Calculator
Calculate triangle perimeter from three side lengths and validate the triangle inequality.
OpenTriangle Angle Calculator
Calculate triangle angles from three side lengths using the law of cosines and validate the triangle inequality.
OpenPolygon Area Calculator
Calculate the area of a regular polygon from the number of sides and side length. Includes validation, result cards, and FAQ schema.
OpenTrigonometry Calculator
Calculate sin, cos, and tan from an angle in degrees or radians. Includes validation, result cards, and FAQ schema.
OpenSin Calculator
Calculate sine of an angle in degrees or radians. Includes validation, result cards, and FAQ schema.
OpenCos Calculator
Calculate cosine of an angle in degrees or radians. Includes validation, result cards, and FAQ schema.
OpenTan Calculator
Calculate tangent of an angle in degrees or radians. Includes validation, undefined-case handling, result cards, and FAQ schema.
OpenLogarithm Solver
Solve logarithm equations by finding the exponent, base, or result in b^x = y. Includes validation, result cards, and FAQ schema.
OpenEquation Solver
Solve linear equations and quadratic equations. Includes validation, result cards, and FAQ schema.
OpenCircle Sector Calculator
Calculate circle sector area, arc length, and related values from radius and angle. Includes validation, result cards, and FAQ schema.
OpenSphere Volume Calculator
Calculate sphere volume, surface area, and diameter from a radius. Includes validation, result cards, and FAQ schema.
OpenCone Volume Calculator
Calculate cone volume, slant height, and surface area from radius and height. Includes validation, result cards, and FAQ schema.
OpenPyramid Volume Calculator
Calculate pyramid volume from base area and height, or from square-base side length and height. Includes validation, result cards, and FAQ schema.
OpenHow to choose the right calculator
If your problem is about comparing parts of a number, start with percentage or ratio tools. If it is about repeated values or summaries, use averages or statistics-related pages. If the problem involves shapes or measurements, choose a geometry-oriented calculator.
Splitting these tasks across focused tools makes results easier to read and avoids turning one page into a large general-purpose calculator with too many unrelated inputs.
Why this category is separate
Math tools are different from converters, finance calculators, or general utilities because they are centered on numeric relationships and formula-based problem solving rather than one fixed workflow.
Grouping them in one category makes it easier to browse related calculators together and helps visitors move from a general math task to the specific page that matches the formula or result they need.