Math Calculators
Calculate percentages, fractions, ratios and more
50 calculators in this category
Percentage Calculator
Find any percentage in seconds — what is X% of Y, percentage increase or decrease, and percentage difference. Shows step-by-step solutions and formulas.
Fraction Calculator
Add, subtract, multiply, and divide fractions with clear step-by-step solutions. Simplify fractions, convert to decimals, and handle mixed numbers easily.
Ratio Calculator
Solve proportions, simplify ratios, find missing values, and calculate scale factors. Shows step-by-step cross-multiplication solutions and worked examples.
Area Calculator
Calculate the area of rectangles, circles, triangles, and trapezoids. Includes all formulas, unit conversions, and material estimates for your project.
Volume Calculator
Calculate the volume of 3D shapes including cubes, boxes, spheres, cylinders, cones, and pyramids. Supports multiple units with instant conversions. Compare.
Percentage Change Calculator
Calculate the percentage increase or decrease between two values. Shows the formula, absolute change, and direction — works for prices, grades, and data.
Scientific Notation Calculator
Convert any number to and from scientific notation. Enter a value to see the coefficient, exponent, and standard form — includes step-by-step breakdown.
Binary Calculator
Convert decimal numbers to binary and binary to decimal. Useful for programming, computer science, and digital electronics with step-by-step conversion.
Square Root Calculator
Find the square root of any number — perfect squares, decimals, or large numbers. Shows whether the result is rational and includes simplification steps.
Circle Calculator
Enter a radius to calculate circle area, circumference, and diameter. Shows all geometry formulas and supports any unit — inches, feet, meters, or centimeters.
Triangle Calculator
Calculate triangle area, perimeter, and semi-perimeter from base and height. Shows step-by-step solutions using standard formulas and Heron's formula.
Rectangle Calculator
Enter length and width to calculate rectangle area, perimeter, and diagonal. Useful for rooms, lots, and construction projects with step-by-step math.
Cylinder Calculator
Enter radius and height to find cylinder volume, surface area, and lateral surface area. Shows all formulas with step-by-step calculations for any units.
Sphere Calculator
Enter a radius to calculate sphere volume, surface area, and diameter. Works for geometry homework, engineering, and science — shows all formulas used.
Statistics Calculator
Enter your data set to calculate mean, median, mode, standard deviation, variance, and z-scores. Supports sample and population statistics for any data.
Quadratic Equation Calculator
Solve quadratic equations (ax² + bx + c = 0) and find roots, discriminant, vertex, and axis of symmetry. Shows step-by-step solution with the quadratic formula.
Probability Calculator — Combos & Perms
Calculate probability for single events, combinations, and permutations. Find P(A), complement, at-least-once probability, plus C(n,r) and P(n,r) values.
Average Calculator
Calculate arithmetic mean, weighted average, geometric mean, harmonic mean, median, and mode for any data set. Includes summary statistics and formulas.
Combination Calculator — nCr with Steps
Calculate combinations (nCr) with step-by-step solutions. Find selections with or without repetition, compare with permutations and Pascal's triangle.
Cone Calculator
Calculate cone volume, surface area, lateral area, and slant height from radius and height. Shows step-by-step geometry formulas for homework and engineering.
Confidence Interval Calculator
Calculate confidence intervals for means and proportions at 90%, 95%, or 99% confidence levels. Find margin of error, z-critical values, and standard error.
Correlation Calculator
Calculate Pearson correlation coefficient (r), R-squared, and linear regression equation. Enter X and Y data sets to analyze the strength of relationships.
Distance Calculator
Calculate the distance between two points in 2D or 3D using the distance formula. Shows squared distance, midpoint, components, and step-by-step work.
Ellipse Calculator
Calculate ellipse area, perimeter, eccentricity, foci, and flattening. Uses Ramanujan approximation for accurate circumference with full property breakdown.
Exponent Calculator
Calculate powers (x^n), nth roots, and negative exponents with step-by-step solutions. Shows scientific notation, reciprocals, and exponent rule breakdowns.
Factorial Calculator
Calculate n! factorial, double factorial (n!!), and subfactorial (!n) instantly. Shows digit count, trailing zeros, Stirling approximation, and step-by-step.
Fibonacci Calculator
Calculate any Fibonacci number, generate the full sequence, and explore how consecutive ratios converge to the golden ratio. Includes Binet formula check.
GCD & LCM Calculator
Calculate the Greatest Common Divisor and Least Common Multiple of two or more numbers. Step-by-step Euclidean algorithm with prime factorization breakdown.
Logarithm Calculator
Calculate logarithms instantly with log base 10, natural log (ln), log base 2, and custom bases. Shows change of base formula and step-by-step solutions.
Long Division Calculator
Perform long division with detailed step-by-step work showing quotient, remainder, decimal expansion, and fraction form. Verify your answers instantly.
Midpoint Calculator
Find the midpoint between two points in 2D or 3D using the midpoint formula. Shows distance, slope, and step-by-step coordinate geometry calculations.
Mixed Number Calculator
Add, subtract, multiply, and divide mixed numbers with detailed step-by-step solutions. Convert between mixed numbers, improper fractions, and decimals.
Number Base Calculator
Convert numbers between any bases from 2 to 36. Supports binary, octal, decimal, hexadecimal, and custom radix conversions with step-by-step solutions.
Permutation Calculator — nPr with Steps
Calculate permutations (nPr) with step-by-step factorial expansion. Find ordered arrangements with or without repetition and compare with combinations.
Prime Factorization Calculator
Find the prime factorization of any number with a step-by-step factor tree. Shows all divisors, total divisor count, sum of divisors, and primality test.
Proportion Calculator
Solve proportions using cross multiplication. Enter any 3 known values in a/b = c/d and instantly find the missing fourth value with step-by-step work.
Pyramid Calculator
Calculate pyramid volume and surface area for square, rectangular, or triangular bases. Shows slant height, lateral area, and all step-by-step formulas.
Pythagorean Theorem Calculator
Solve a² + b² = c² for any missing side with step-by-step solutions. Identifies Pythagorean triples and calculates triangle area, perimeter, and angles.
Right Triangle Calculator
Solve any right triangle by entering two known values. Find all missing sides, angles, area, and perimeter with detailed step-by-step solutions instantly.
Roman Numeral Calculator — Convert & Learn
Convert between Roman numerals and Arabic numbers instantly. See symbol breakdowns, subtractive notation rules, and a complete reference table (1-3999).
Rounding Calculator
Round numbers to any decimal place with six rounding modes including half-up, half-down, banker's rounding, ceiling, floor, and truncate. Compare results.
Significant Figures Calculator
Count significant figures in any number and round to a desired number of sig figs. See which digits are significant with color-coded digit-by-digit analysis.
Slope-Intercept Calculator
Find the slope, y-intercept, and line equation y=mx+b from two points or a point and slope. Shows x-intercept, angle, parallel and perpendicular slopes.
Standard Deviation Calculator
Calculate population and sample standard deviation, variance, mean, and coefficient of variation. Shows step-by-step deviations table for any data set.
Trapezoid Calculator
Calculate trapezoid area, perimeter, median, and diagonals from bases, height, and sides. Shows step-by-step formulas for isosceles and general trapezoids.
Trigonometry Calculator
Calculate sin, cos, tan, csc, sec, and cot for any angle in degrees or radians. Includes inverse trig functions, reference angles, and quadrant details.
Z-Score Calculator
Calculate z-scores, percentiles, and probabilities from the standard normal distribution. Enter a value, mean, and standard deviation for instant results.
Series & Sequence Calculator — Arithmetic & Geometric Sums
Calculate arithmetic and geometric series sums, nth terms, and convergence. Get partial sums, infinite sums, mean values, and term breakdowns instantly.
Matrix Calculator — Determinant, Inverse, Multiply & Transpose
Calculate matrix determinants, inverses, transposes, and products for 2×2 and 3×3 matrices. Get step-by-step solutions with formatted output and cofactors.
Polygon Calculator — Regular Polygon Properties
Calculate properties of any regular polygon. Enter sides and length to get area, perimeter, angles, apothem, circumradius, and diagonals with an SVG visual.