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.
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.
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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.
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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.
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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.
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Long Division Calculator
Divide any two integers with a visual long-division layout and numbered step-by-step explanations. BigInt support for large numbers.
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Base Converter
Convert numbers between binary, octal, decimal, hexadecimal and any base 2–36 with step-by-step decomposition.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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!.
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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.
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