Numbers Tools

Convert numbers between binary, octal, decimal, and hexadecimal, all bases shown simultaneously. Uses BigInt for large numbers.

Format numbers with locale-aware thousands separators, currency, units, and notation styles.

Five percentage formulas: % of number, part of total, % change, add/remove %, and reverse %.

Convert between Roman numerals and decimal integers (1–3999) with visual breakdown.

Convert between pixel and rem CSS values with Tailwind scale reference.

Convert between length, weight, temperature, volume, area, speed, and data units, all at once.

Generate cryptographically random integers, floats, dice rolls, or pick from a list.

Calculate GCD and LCM for two or more integers. Shows step-by-step prime factorization.

Check if a number is prime, find its prime factorization, divisors, and nearest primes.

Generate Fibonacci sequences, find the Nth number, or check if a number is Fibonacci. Uses bigint for large values.

Perform bitwise AND, OR, XOR, NOT, NAND, NOR, XNOR, and bit-shifts. Shows results in decimal, binary, hex, and octal.

Convert numbers to/from scientific notation. Shows engineering notation, SI prefixes, and significant figures.

Add, subtract, multiply, divide, simplify, or compare fractions. Shows step-by-step working with LCM.

Add, subtract, multiply matrices, find determinant, inverse, or transpose. One row per line, values space-separated.

Compute mean, median, mode, variance, std dev, quartiles, IQR, skewness, and geometric mean for a dataset.

Generate arithmetic, geometric, Fibonacci, prime, square, cube, triangular, power, factorial, or custom formula sequences.

Convert numbers to English words. Supports integers, decimals, currency amounts, and ordinal forms up to quintillions.