Math & Numbers
Number theory, statistics, geometry, algebra, and scientific calculators
Fraction Calculator
Add, subtract, multiply, or divide fractions with step-by-step solutions. Simplify and convert between fractions, decimals, and percentages.
Ratio Calculator
Simplify ratios, scale to a target, compare ratios, and convert to fractions or percentages. Includes aspect ratio presets.
Exponent & Power Calculator
Calculate x raised to the power of n, with support for negative and fractional exponents, and scientific notation output.
Square Root Calculator
Calculate square roots, cube roots, and nth roots with radical simplification and configurable decimal precision.
Logarithm Calculator
Calculate common log, natural log, binary log, or any custom-base logarithm with antilog support.
GCD & LCM Calculator
Find the greatest common divisor and least common multiple of two or more numbers with step-by-step prime factorization.
Prime Number Tools
Check if a number is prime, find its prime factorization, list primes in a range, or find the Nth prime number.
Factorial Calculator
Calculate n factorial, double factorial, subfactorial, trailing zeros, and digit count with large number support.
Fibonacci Generator
Generate Fibonacci sequences, check if a number is Fibonacci, and see the golden ratio convergence.
Random Number Generator
Generate random numbers, roll dice, flip coins, or pick random items from a list. Cryptographic option available.
PopularNumber Base Converter
Convert numbers between binary, decimal, hexadecimal, octal, and any base from 2 to 36 with live updates.
PopularRoman Numeral Converter
Convert between numbers and Roman numerals instantly. Supports 1-3999 with validation, batch mode, and a quick-reference table.
Number to Words Converter
Convert numbers to English words, currency format, or ordinals. Supports very large numbers and multiple currencies.
Percentage Calculator
Calculate percentages instantly — find X% of Y, what percentage X is of Y, or the percentage change between two values.
PopularStatistics Calculator
Calculate mean, median, mode, standard deviation, variance, quartiles, and more from a data set. Includes histogram.
Probability Calculator
Calculate single event, compound, conditional, and Bayes theorem probabilities with formula display.
Permutation & Combination Calculator
Calculate permutations (nPr) and combinations (nCr) with step-by-step formula breakdown and large number support.
Triangle Calculator
Solve triangles by entering sides and angles. Supports SSS, SAS, ASA, AAS modes with area, perimeter, and SVG diagram.
Circle Calculator
Calculate radius, diameter, circumference, and area from any one value. Includes arc length and sector area calculations.
Area & Perimeter Calculator
Calculate area and perimeter for rectangles, squares, triangles, parallelograms, trapezoids, ellipses, and regular polygons.
Volume & Surface Area Calculator
Calculate volume and surface area for cubes, spheres, cylinders, cones, pyramids, and more 3D shapes.
Quadratic Equation Solver
Solve ax2 + bx + c = 0 with real or complex roots, step-by-step solution, vertex, and parabola graph.
Scientific Calculator
A full-featured scientific calculator with trigonometry, logarithms, exponents, memory, and calculation history.
PopularMatrix Calculator
Perform matrix operations including addition, multiplication, determinant, inverse, transpose, and row echelon form.
Grade Calculator
Calculate weighted grades, GPA, and what you need on your final exam. Supports multiple grading systems.
Tackle mathematical problems quickly with our free online calculators and number tools. Perform percentage calculations, convert between number bases, solve equations, compute statistical measures, work with fractions and matrices, and explore geometry. Whether you are a student, teacher, or professional, these tools make number crunching effortless.