Math & Statistics Calculators
From basic arithmetic to matrix algebra and hypothesis testing — exact answers, shown step by step.
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Overview
This is the largest and most varied category on the site because 'math calculator' covers an enormous range — from a basic four-function calculator to matrix inversion, linear regression, and confidence intervals. What ties them together is that each one is built to be exact for the inputs you give it, not an approximation, and each is meant to save you from either doing tedious repetitive arithmetic by hand or from getting a graphing calculator or full statistics package just to check one number.
All Math & Statistics Calculators
Absolute Value of a List of Numbers
Convert an entire list of numbers to their absolute…
Add a Number to a List Calculator
Add the same fixed number to every value in a list at…
Area Calculator
Calculate the area and perimeter of ten common 2D shapes…
Average Calculator
Calculate the arithmetic mean plus geometric mean…
Average Percentage Calculator
Find the average of a list of percentages.
Basic Calculator
A full-featured everyday calculator for addition…
Beta Function Calculator
Calculate the Beta function B(m, n) using the Gamma…
Bidiagonal Matrix Checker
Check whether a square matrix has non-zero entries only…
Big Number Calculator
Add, subtract, multiply, divide, and raise to powers…
Binary Calculator
Convert instantly between binary, octal, decimal, and…
Chi-Square Calculator
Calculate a chi-square statistic comparing observed…
Circle Calculator
Enter any one known circle property — radius, diameter, c…
Coefficient of Variation Calculator
Calculate the coefficient of variation — standard d…
Coin Flip Probability Calculator
Calculate the probability of getting a specific number of…
Combination Calculator (nCr)
Calculate the number of ways to choose r items from a set…
Common Factor Calculator
Find every factor shared by two to five numbers at once…
Confidence Interval Calculator
Build a confidence interval around a sample mean (using a…
Correlation Coefficient Calculator
Calculate the Pearson correlation coefficient (r) between…
Covariance Calculator
Calculate the covariance between two paired data sets.
Cramer's Rule Calculator
Solve a 2×2 or 3×3 system of linear equations using C…
Degrees Minutes Seconds Calculator
Convert coordinates or angles between decimal degrees and…
Determinant Calculator
Calculate the determinant of a 2×2, 3×3, or 4×4 matrix wi…
Diagonal Matrix Checker
Check whether a square matrix is diagonal — every entry o…
Dice Probability Calculator
Calculate the probability of rolling a specific total…
Distance Calculator
Calculate the straight-line (Euclidean) distance between…
Expected Value Calculator
Calculate the expected value of an uncertain outcome from…
Exponent Calculator
Calculate any power b^n, convert numbers into and out of…
Factor Calculator
List every factor of any positive integer, its prime…
Five Number Summary Calculator
Calculate the five-number summary of a data set: minimum…
Fraction Calculator
Add, subtract, multiply, or divide two fractions and see…
Gauss-Jordan Elimination Calculator
Solve a system of linear equations Ax = b by reducing the…
GCF Calculator
Find the Greatest Common Factor (GCF, also called GCD) of…
Half-Life Calculator
Model radioactive or exponential decay — find how much of…
Hex Calculator
Convert hexadecimal values to and from decimal, binary…
Idempotent Matrix Checker
Check whether a square matrix satisfies A × A = A.
Inverse Matrix Calculator
Find the inverse of a 2×2, 3×3, or 4×4 matrix using Ga…
Inverse Matrix Method Calculator
Solve a system of linear equations Ax = b by first…
Invertible Matrix Checker
Check whether a square matrix has an inverse by testing…
Involutory Matrix Checker
Check whether a square matrix is its own inverse — A × A e…
IQR Calculator (Interquartile Range)
Calculate the interquartile range — the spread of the m…
LCM Calculator
Find the Least Common Multiple (LCM) of up to 10 numbers…
Linear Regression Calculator
Find the best-fit straight line (slope and intercept)…
Log Calculator
Compute logarithms in any base, natural log (ln), log…
Long Division Calculator
Divide any two whole numbers and see the full…
Lower Bidiagonal Matrix Checker
Check whether a square matrix has non-zero entries only…
Lower Hessenberg Matrix Checker
Check whether a square matrix has zero entries everywhere…
Lower Triangular Matrix Checker
Check whether every entry above the main diagonal of a…
Margin of Error Calculator
Calculate the margin of error for a sample estimate at a…
Matrix Addition & Subtraction Calculator
Add or subtract two matrices of the same size, element by…
Matrix Calculator
Perform addition, subtraction, multiplication, scalar…
Matrix Multiplication Calculator
Multiply two matrices of any compatible size and see…
Matrix Power Calculator
Raise a square matrix to any whole-number power from 0 to…
Matrix Rank Calculator
Find the rank of any matrix by reducing it to row-echelon…
Matrix Transpose Calculator
Transpose any matrix instantly, with every element's…
Mean Absolute Deviation Calculator
Calculate the mean absolute deviation — the average d…
Mean, Median, Mode & Range Calculator
Get the mean, median, mode, and range for any dataset…
Negative Definite Matrix Checker
Check whether a symmetric matrix is negative definite — t…
Negative Semi-Definite Matrix Checker
Check whether a symmetric matrix is negative…
Nilpotent Matrix Checker
Check whether repeatedly multiplying a square matrix by…
Nonsingular Matrix Checker
Check whether a square matrix is nonsingular by testing…
Normal Matrix Checker
Check whether a square matrix commutes with its own…
Number Sequence Calculator
Generate arithmetic, geometric, Fibonacci, or…
Odds Calculator
Convert between probability and decimal betting odds.
Orthogonal Matrix Checker
Check whether a square matrix satisfies A·Aᵀ = the id…
Outlier Calculator
Identify statistical outliers in a data set using the…
P-value Calculator
Find the p-value for a Z-test, t-test, or chi-square test…
Percent Error Calculator
Compare a measured (experimental) value against the…
Percentage Calculator
Solve the three most common percentage problems…
Permutation & Combination Calculator
Calculate permutations (nPr, ordered arrangements) and…
Permutation Calculator (nPr)
Calculate the number of ways to arrange r items from a…
Positive Definite Matrix Checker
Check whether a symmetric matrix is positive definite…
Prime Factorization Calculator
Break any whole number down into its prime factors, see…
Probability Calculator
Calculate basic event probability and odds, combine two…
Pythagorean Theorem Calculator
Find the hypotenuse or a missing leg of any right…
Quadratic Formula Calculator
Solve any quadratic equation ax² + bx + c = 0 for its…
Quartile Calculator
Find the first, second (median), and third quartiles of a…
Random Number Generator
Generate one or more random integers within any range you…
Ratio Calculator
Simplify a ratio to its lowest terms, solve for a missing…
Right Triangle Calculator
Solve a complete right triangle — all sides, both acute a…
Roman Numeral Converter
Convert whole numbers into Roman numerals or translate…
Root Calculator
Calculate square roots, cube roots, or any nth root of a…
Rounding Calculator
Round any number to a chosen number of decimal places or…
Sample Size Calculator
Work out the minimum number of survey respondents or…
Scientific Calculator
A full-featured scientific calculator for trigonometric…
Scientific Notation Calculator
Convert any decimal number to and from scientific…
Slope Calculator
Find the slope, y-intercept, line equation, distance, and…
Standard Deviation Calculator
Enter any list of numbers to get the population or sample…
Statistics Calculator
Paste in any dataset to instantly get a full descriptive…
Surface Area Calculator
Calculate the total surface area, lateral surface area…
T-Test Calculator
Calculate the t-statistic for comparing the means of two…
Triangle Calculator
Solve any triangle — find every missing side, angle, and t…
Volume Calculator
Calculate the volume and total surface area of eight…
Z-score Calculator
Convert a raw score to a z-score (standard deviations…
How to Choose the Right Tool
For everyday arithmetic and unit-level questions (percentages, rounding, ratios, fractions), the basic calculators are built for speed. For algebra and geometry (quadratic formula, area, the Pythagorean theorem, triangle solving), pick the calculator matching the shape or equation you're working with. For statistics (mean/median/mode, standard deviation, correlation, regression, confidence intervals, p-values), pick based on what you're trying to test or summarize, not just the dataset size. For linear algebra (matrix operations, determinants, Gauss-Jordan elimination), each calculator handles one specific operation — know which operation you need before picking the tool.
At a Glance
| Calculator group | Typical use | Example tools |
|---|---|---|
| Basic & Arithmetic | Everyday quick math | Basic Calculator, Percent Calculator, Rounding Calculator |
| Algebra & Geometry | Solving equations and shapes | Quadratic Formula, Area Calculator, Triangle Calculator |
| Statistics | Summarizing or testing data | Standard Deviation, Correlation Coefficient, P-Value Calculator |
| Linear Algebra | Matrix operations | Matrix Calculator, Determinant Calculator, Inverse Matrix Calculator |
| Number Systems | Converting between bases/formats | Binary Calculator, Hex Calculator, Scientific Notation Calculator |
Common Mistakes to Avoid
- Mixing up population vs. sample standard deviation — they use slightly different formulas and give different results; check which one your assignment or analysis calls for.
- Rounding intermediate steps in a multi-step calculation instead of only rounding the final answer — this compounds small errors, especially in statistics and finance-adjacent math.
- Using the wrong quartile convention — there are multiple standard methods for calculating quartiles, and they can give slightly different results on the same dataset.
- Assuming correlation implies causation when interpreting a correlation coefficient — the calculator can tell you two variables move together, not why.
Frequently Asked Questions
Do these calculators show their work, or just the final answer?
Most calculators in this category show the key intermediate values (not just the final result) so you can follow the method — useful for checking homework or understanding where a number came from, not just what it is.
Which quartile/rounding convention do you use?
Where a formula has more than one commonly used convention, the specific method is stated directly on that calculator's page so the result isn't ambiguous.
Can I use these for graded schoolwork?
They're accurate for the standard formulas they implement, but always confirm the convention matches what your course or instructor expects — see our Disclaimer.
Is there a limit on matrix size for the linear algebra calculators?
Each matrix calculator is built for typical classroom and practical sizes; very large matrices may be better suited to dedicated software.
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