175 math calculators that get the numbers right.
Percentages and fractions, algebra, geometry, statistics, probability and calculus. No signup, no paywalls.
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Everyday Math 21 calculators
- Average CalculatorAverage, sum, min and max of a list
- Concentration & Dilution CalculatorMolarity and C1V1 = C2V2 dilutions
- Exponent CalculatorPowers, roots and fractional exponents
- Fraction CalculatorAdd, subtract, multiply, divide fractions
- GPA CalculatorSemester and cumulative GPA
- Grade CalculatorYour final grade and what you need
- Long Division CalculatorLong division, step by step
- Long Multiplication CalculatorLong multiplication, step by step
- Mixed Number CalculatorMath with mixed numbers
- Molar Mass CalculatorMolar mass of a chemical compound
- Order of Operations CalculatorSolve an expression with PEMDAS
- Percent Error CalculatorPercent error vs. the true value
- Percentage CalculatorPercentages of anything
- Percentage Change CalculatorPercentage increase or decrease
- Random Number GeneratorRandom numbers in any range
- Ratio CalculatorSimplify ratios and solve proportions
- Root CalculatorSquare, cube and nth roots
- Rounding CalculatorRound to decimals or sig figs
- Scientific CalculatorA full scientific calculator
- Scientific Notation CalculatorConvert to scientific notation
- Significant Figures CalculatorCount and round significant figures
Algebra 13 calculators
- Absolute Value CalculatorAbsolute values, equations and inequalities
- Arithmetic Sequence Calculatornth term and sum of a sequence
- Completing the Square CalculatorTurn a quadratic into vertex form
- Cubic Equation CalculatorSolve a cubic equation
- Exponential Growth CalculatorExponential growth and decay
- Linear Interpolation CalculatorEstimate a value between two points
- Logarithm CalculatorLogs in any base, step by step
- Partial Fraction CalculatorPartial fraction decomposition
- Quadratic Formula CalculatorSolve a quadratic equation
- Sequence & Series CalculatorSequences, series and convergence
- Summation CalculatorEvaluate sigma notation
- Synthetic Division CalculatorDivide a polynomial by (x − c)
- System of Equations CalculatorSolve 2×2 and 3×3 systems
Geometry 41 calculators
Geometry overview
- 3D Distance CalculatorDistance between two 3D points
- Annulus CalculatorArea of a ring
- Area & Perimeter CalculatorArea and perimeter of rectangles
- Chord Length CalculatorChord length in a circle
- Circle CalculatorCircle area, circumference, diameter
- Circular Segment CalculatorArea and arc of a circular segment
- Cone CalculatorCone volume and surface area
- Cube CalculatorCube volume, area and diagonals
- Cylinder CalculatorCylinder volume and surface area
- Diagonal CalculatorDiagonal of a rectangle or box
- Distance Between PointsDistance and midpoint of two points
- Ellipse CalculatorEllipse area, perimeter and foci
- Frustum CalculatorVolume of a truncated cone
- Golden Ratio CalculatorSplit a length by the golden ratio
- Great-Circle Distance CalculatorDistance between two lat/long points
- Hemisphere CalculatorHemisphere volume and area
- Heron's Formula CalculatorTriangle area from three sides
- Kite CalculatorKite area and perimeter
- Line Equation CalculatorEquation of a line
- Midpoint CalculatorMidpoint between two points
- Octahedron CalculatorOctahedron volume and area
- Parallelogram CalculatorParallelogram area and diagonals
- Polygon Area CalculatorArea of any polygon
- Pyramid CalculatorPyramid volume and surface area
- Pythagorean Theorem CalculatorSolve with the Pythagorean theorem
- Pythagorean Triples CalculatorGenerate and check Pythagorean triples
- Rectangular Prism CalculatorBox volume and surface area
- Regular Polygon CalculatorRegular polygon area and angles
- Rhombus CalculatorRhombus area and diagonals
- Right Triangle CalculatorSolve a right triangle
- Section Formula CalculatorPoint that divides a line in a ratio
- Slope CalculatorSlope and line equation from points
- Sphere CalculatorSphere volume and surface area
- Spherical Cap CalculatorVolume of a spherical cap
- Surface Area CalculatorSurface area of common solids
- Tetrahedron CalculatorTetrahedron volume and area
- Torus CalculatorTorus volume and surface area
- Trapezoid CalculatorTrapezoid area and perimeter
- Triangle CalculatorTriangle sides, angles and area
- Triangular Prism CalculatorTriangular prism volume and area
- Volume CalculatorVolume of common shapes
Trigonometry 7 calculators
- Arc Length CalculatorArc length and sector area
- Double Angle CalculatorDouble-angle identities
- Law of Cosines CalculatorSolve a triangle with cosines
- Law of Sines CalculatorSolve a triangle with sines
- Radians to Degrees CalculatorRadians to degrees and back
- Trigonometry CalculatorSin, cos, tan and their inverses
- Unit Circle CalculatorUnit circle coordinates for any angle
Descriptive Statistics 27 calculators
- Box Plot CalculatorBox plot and five-number summary
- Coefficient of Variation CalculatorCoefficient of variation
- Correlation Coefficient CalculatorPearson correlation and regression
- Covariance CalculatorCovariance of paired data
- Frequency Distribution CalculatorFrequency table from raw data
- Geometric Mean CalculatorGeometric mean of positive numbers
- Harmonic Mean CalculatorHarmonic mean for rates and speeds
- Linear Regression CalculatorRegression line, slope and R-squared
- Mean Absolute Deviation CalculatorMean absolute deviation
- Mean Median Mode CalculatorMean, median, mode and range
- Mean Squared Error CalculatorMSE and RMSE of predictions
- Midrange CalculatorMidrange of a data set
- Outlier CalculatorFind outliers with IQR or z-scores
- Percentile CalculatorPercentile value or rank
- Pooled Variance CalculatorPooled variance of groups
- Quartile CalculatorQuartiles and interquartile range
- R-Squared CalculatorR-squared from your data
- Relative Frequency CalculatorRelative and cumulative frequency
- Skewness and Kurtosis CalculatorSkewness and kurtosis of data
- Spearman's Correlation CalculatorSpearman rank correlation
- Standard Deviation CalculatorStandard deviation and variance
- Standard Error CalculatorStandard error of the mean
- Statistics Calculator (Descriptive)Mean, median, SD, quartiles and more
- Sum of Squares CalculatorSum of squares of a data set
- Variance CalculatorVariance of a data set
- Weighted Average CalculatorWeighted average of values
- Z-Score CalculatorZ-score and percentile
Probability 14 calculators
- Bayes' Theorem CalculatorPosterior probability with Bayes
- Binomial Distribution CalculatorBinomial probabilities
- Central Limit Theorem CalculatorSampling distribution and standard error
- Conditional Probability CalculatorP(A given B)
- Dice Probability CalculatorDice roll odds for any game
- Empirical Rule CalculatorThe 68-95-99.7 rule
- Expected Value CalculatorExpected value of outcomes
- Exponential Distribution CalculatorExponential distribution probabilities
- Geometric Distribution CalculatorChance the first success is on trial k
- Hypergeometric Distribution CalculatorProbabilities without replacement
- Normal Distribution CalculatorNormal distribution probabilities
- Permutation & Combination CalculatorPermutations and combinations
- Poisson Distribution CalculatorPoisson probabilities
- Probability CalculatorProbability of events, step by step
Statistical Tests 18 calculators
- ANOVA CalculatorOne-way ANOVA with F and p-value
- Chi-Square CalculatorChi-square test with p-value
- Confidence Interval CalculatorConfidence intervals for means
- Critical Value Calculatorz, t, chi-square and F critical values
- Degrees of Freedom CalculatorDegrees of freedom for common tests
- Effect Size CalculatorCohen's d effect size
- F-Test CalculatorF-test for two variances
- Hypothesis Test Calculatort and chi-square tests from raw data
- Mann-Whitney U Test CalculatorMann-Whitney U test
- Margin of Error CalculatorMargin of error for a survey
- Odds Ratio CalculatorOdds ratio and relative risk
- P-Value CalculatorIs your result significant?
- Point Estimate CalculatorBest estimate of a proportion
- Sample Size CalculatorSample size for a survey or test
- Sensitivity and Specificity CalculatorAccuracy of a diagnostic test
- Statistical Power CalculatorStatistical power or sample size
- T-Test CalculatorOne-sample, two-sample or paired t-test
- Z-Test Calculatorz-test for means or proportions
Calculus & Linear Algebra 19 calculators
- Cofactor Expansion CalculatorDeterminant by cofactor expansion
- Complex Number CalculatorArithmetic with complex numbers
- Cross Product CalculatorCross product of two 3D vectors
- Derivative CalculatorDerivatives with the tangent line
- Dot Product CalculatorDot product and angle between vectors
- Eigenvalue CalculatorEigenvalues and eigenvectors
- Fourier Series VisualizerWatch a Fourier series build a wave
- Integral CalculatorEstimate a definite integral
- LU Decomposition CalculatorLU decomposition of a matrix
- Matrix CalculatorMatrix math and solving systems
- Matrix Determinant CalculatorDeterminant of a matrix
- Matrix Inverse CalculatorInverse of a matrix
- Matrix Multiplication CalculatorMultiply two matrices
- Matrix Rank CalculatorRank of a matrix
- Matrix Trace CalculatorTrace of a square matrix
- Matrix Transpose CalculatorTranspose of a matrix
- Scalar Triple Product CalculatorScalar triple product of vectors
- Vector CalculatorVector sums, dot and cross products
- Vector Projection CalculatorProject one vector onto another
Numbers & Logic 15 calculators
- Bitwise CalculatorAND, OR, XOR and bit shifts
- Collatz Conjecture CalculatorCollatz sequence for any number
- Continued Fraction CalculatorContinued fraction of a number
- Euler's Totient CalculatorEuler's totient φ(n)
- Factorial Calculatorn! for any number
- Factors CalculatorAll the factors of a number
- Fibonacci CalculatorAny Fibonacci number, exactly
- GCF and LCM CalculatorGreatest common factor and LCM
- Modular Exponentiation Calculatora^b mod m, fast
- Modulo Calculatora mod n and the remainder
- Pascal's Triangle CalculatorPascal's triangle and n choose k
- Prime Factorization CalculatorPrime factors of a number
- Prime Number CalculatorIs it prime? Plus primes in a range
- Set Theory CalculatorUnion, intersection and difference
- Truth Table GeneratorTruth table for a logic expression