57 math calculators — percentages, fractions, algebra, geometry, probability, statistics — each with the formula it uses printed on the page and a worked example. No black-box answers.
Formulas follow standard definitions from the NIST Digital Library of Mathematical Functions and classical textbooks. Calculations run entirely in your browser.
Not sure which calculator you need? Find the right tool for your task below. Each calculator includes step-by-step explanations so you can learn the underlying math, not just get an answer.
Core tools for algebra, arithmetic, and test prep. These calculators show their work so you can follow the solution method and apply it to similar problems on your own.
Tools for analyzing datasets, running hypothesis tests, and building regression models. Useful for statistics courses, research projects, and anyone working with real-world data.
Calculate dimensions, areas, and volumes for 2D and 3D shapes. Helpful for geometry homework, construction planning, or any situation where you need precise measurements.
Everyday number tools for percentages, exponents, factors, and base conversions. Great for quick calculations, number theory homework, and programming tasks.
Calculus, linear algebra, and equation-solving tools for college-level coursework. Each calculator breaks down the solution process so you can verify your manual work.
Yes. Most of our calculators, including the fraction calculator, quadratic formula calculator, derivative calculator, and standard deviation calculator, display a full breakdown of each step in the solution. This is designed to help you learn the method, not just copy an answer. For example, the fraction calculator shows how it finds a common denominator, and the derivative calculator identifies which differentiation rules it applies at each stage.
These calculators use standard mathematical algorithms and are accurate for the types of problems covered in middle school through college-level courses. Floating-point arithmetic can introduce tiny rounding differences in extreme cases (very large numbers or many decimal places), but for typical homework problems the results match what you would get by hand. We also offer a big number calculator for situations that require arbitrary-precision arithmetic beyond standard floating-point limits.
The basic calculator handles the four standard operations (addition, subtraction, multiplication, division) and is ideal for quick everyday arithmetic. The scientific calculator adds trigonometric functions (sin, cos, tan), logarithms (log, ln), exponents, factorials, and constants like pi and e. If you are working on a problem that involves angles, exponential growth, or any function beyond simple arithmetic, the scientific calculator is the right choice.
The graphing calculator lets you plot any function and visually explore its behavior, which is useful for understanding limits, continuity, and the shape of derivatives and integrals. However, it is primarily a visualization tool. For symbolic differentiation and integration with step-by-step work, use the dedicated derivative calculator or integral calculator. A good workflow is to solve the problem symbolically first, then graph the original function and its derivative together to confirm your result visually.
This distinction matters because sample calculations use (n - 1) in the denominator (Bessel's correction) while population calculations use n. Our standard deviation calculator and variance calculator let you choose between sample and population mode so you get the correct result for your context. As a rule of thumb, if your data represents a complete group (every student in a class, every transaction in a quarter), use population. If your data is a subset drawn from a larger group (a survey of 200 out of 10,000 customers), use sample. The confidence interval and p-value calculators also account for sample size in their formulas automatically.
Advanced scientific calculator with trigonometry, logarithms, and exponential functions.
Simple calculator for basic arithmetic operations including addition, subtraction, multiplication, and division.
Calculate percentages, percentage change, and percentage of a number. Multiple calculation modes available.
Add, subtract, multiply, and divide fractions with step-by-step solutions and automatic simplification.
Calculate powers and exponents. Supports positive, negative, and fractional exponents.
Calculate logarithms with any base including natural log (ln) and common log (log10).
Calculate square roots, cube roots, and nth roots of any number.
Calculate mean average of a set of numbers quickly and easily.
Round numbers to specified decimal places or significant figures.
Calculate with arbitrarily large numbers beyond standard limits.
Calculate percent error between expected and actual values for error analysis.
Find the Greatest Common Factor (GCD) of two or more numbers with detailed steps.
Calculate the Least Common Multiple of two or more numbers with explanation.
Find all factors of a number including prime and composite factors.
Break down numbers into their prime factors with detailed factorization tree.
Find all common factors shared between two or more numbers.
Perform long division with step-by-step solution showing all work.
Find patterns in number sequences and predict the next terms.
Generate random numbers within a specified range for various purposes.
Convert between binary, decimal, hexadecimal, and octal number systems.
Convert and perform arithmetic with hexadecimal numbers.
Convert numbers to and from scientific notation (exponential form).
Convert between Roman numerals and decimal numbers.
Calculate triangle area, perimeter, angles, and sides with various input methods.
Calculate right triangle properties using Pythagorean theorem and trigonometry.
Calculate the sides of a right triangle using a² + b² = c².
Calculate circle area, circumference, diameter, and radius.
Calculate volume of 3D shapes including spheres, cylinders, cones, and prisms.
Calculate area of various 2D shapes including rectangles, circles, and triangles.
Calculate surface area of 3D shapes including cubes, spheres, and cylinders.
Calculate distance between two points in 2D or 3D coordinate space.
Solve quadratic equations using the quadratic formula with step-by-step solutions.
Calculate the slope of a line from two points and find the equation.
Calculate and simplify ratios, find equivalent ratios, and solve proportion problems.
Perform matrix operations including addition, multiplication, determinant, and inverse.
Calculate comprehensive statistics including mean, median, mode, range, and more.
Calculate mean, variance, and standard deviation for a dataset with detailed steps.
Calculate measures of central tendency including mean, median, and mode.
Calculate required sample size for surveys and statistical studies.
Calculate z-scores and find probabilities from the standard normal distribution.
Calculate confidence intervals for population parameters with various confidence levels.
Calculate p-values for hypothesis testing and statistical significance.
Calculate probabilities for single and multiple events including combinations.
Calculate permutations and combinations for arranging objects in order.
Calculate radioactive decay, exponential decay, and half-life of substances.
Calculate derivatives with step-by-step solutions using power rule, chain rule, product rule, and more.
Calculate indefinite and definite integrals with step-by-step solutions and integration techniques.
Calculate limits with step-by-step solutions including L'Hôpital's rule and special limits.
Solve linear, quadratic, polynomial, and other equations with step-by-step solutions.
Solve systems of linear equations using substitution, elimination, or matrices.
Factor polynomials including trinomials, difference of squares, and perfect squares.
Plot mathematical functions interactively with zoom, pan, and analysis features.
Calculate linear regression with scatter plot visualization, R-squared, and predictions.
Calculate all six trig functions, inverse functions, and identities for any angle.
Calculate sine of angles in degrees or radians with graph visualization.
Calculate cosine of angles in degrees or radians with graph visualization.
Calculate tangent of angles in degrees or radians with graph visualization.
Understand the math with detailed step-by-step explanations for each calculation.
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