Mathematics Tools
Calculators and converters for numbers and math concepts
Our mathematics tools give you instant results with clear, step-by-step explanations. From primality testing to number base conversion — each tool is interactive and built for clarity.
List of Prime Numbers
Browse prime numbers in batches of your chosen size. Move to the next or previous numbers, check any prime, and download the list as TXT.
Open tool →
Prime Number Checker
Check instantly whether any integer up to 1 trillion is prime. See the step-by-step divisibility test and prime factorization for composites.
Open tool →
Prime Factorization
Decompose any integer up to 10¹³ into its prime factors. Get the complete formula, number of divisors (τ), sum of divisors (σ), and a visual factor tree.
Open tool →
Pi Digits
View, copy or download up to 100 million decimal digits of π. Choose any count from 100 to 100,000,000 — raw or grouped-by-10 format.
Open tool →
Find in Pi
Search any number in the first million decimal places of π. Find your birthday, phone number, or any digit sequence — shows exact position and context.
Open tool →
Long Division Calculator
Divide any two integers with a visual long-division layout and numbered step-by-step explanations. BigInt support for large numbers.
Open tool →
Base Converter
Convert numbers between binary, octal, decimal, hexadecimal and any base 2–36 with step-by-step decomposition.
Open tool →
Pi Digit Distribution
Animated chart of how often each digit (0–9) appears in the decimal expansion of π. Watch ten frequencies converge toward 10% — a visual test of the normal number conjecture.
Open tool →
Fraction Calculator
Add, subtract, multiply and divide fractions with step-by-step explanations and automatic reduction. Use the virtual keyboard or type frac(a;b) notation.
Open tool →
GCD and LCM Calculator
Calculate the GCD and LCM of two or more integers up to 1 trillion. See the Euclidean algorithm step by step, prime factorization method, and common divisors.
Open tool →
Divisors Calculator
Find all divisors of any integer up to 1 trillion. Get the complete list, factor pairs, divisor count τ(n), sum of divisors σ(n), and check for perfect numbers.
Open tool →
Quadratic Equation Solver
Solve any ax² + bx + c = 0 equation step by step. Shows discriminant, real or complex roots, vertex, axis of symmetry, and a downloadable parabola graph.
Open tool →
Percentage Calculator
Five calculators in one: X% of Y, what percent, percentage change, reverse percentage, add or remove a percentage. Real-time results with formulas.
Open tool →
Binomial Coefficient Calculator
Compute C(n, k) = n! / (k!(n−k)!) instantly. Shows step-by-step factorial computation, Pascal's triangle with the selected cell highlighted, and a full educational explanation.
Open tool →
Binomial Distribution Calculator
Calculate P(X=k), P(X≤k), P(X>k), mean, variance, and standard deviation for B(n, p). Includes an interactive bar chart and full educational explanation.
Open tool →
Factorial Calculator
Compute N! for any integer from 0 to 170. Exact value, number of digits, scientific notation, Stirling approximation, and a full factorial table from 0! to 170!.
Open tool →
Simplify Fraction
Reduce any fraction a/b to its simplest form using the GCD. See the step-by-step calculation and the visual result. Supports proper fractions, improper fractions, and whole numbers.
Open tool →