All Tools

Find the greatest common divisor (GCD/HCF) and least common multiple (LCM) of two or more numbers, with prime factorization, factors, and step-by-step solutions.

Check if numbers are prime, factorize into prime factors, generate prime lists, and find primes in any range.

Calculate exponents, nth roots, and powers of 2 instantly. Quick presets, a powers-of-2 reference table, options, and saved calculation history.

Convert numbers to and from scientific notation. Auto-detects the direction and shows superscript, standard, E-notation, and caret formats with adjustable precision.

Convert numbers between Binary, Octal, Decimal, and Hexadecimal at once. Built for programmers, students, and anyone working across number systems.

Convert any number to words instantly. Spells out decimals, negative numbers, and check amounts, with a currency mode and 52 languages.

Convert between Roman numerals and Arabic numbers instantly with auto-detection. Single conversion, batch processing, and range generation from 1 to 3999.

Random country generator that picks a random country or city, filters by continent, and shows the flag, capital, population, area, currency and map.

Random date generator that picks a random date, time, or date & time in any range — use presets, exclude weekends, and generate one result or a whole list.

Not sure what should I eat? Spin a random meal idea from world cuisines or your own list, filter by meal, type, diet and taste, then pick up to 10.

Calculate percentages with 5 modes: X% of Y, what percent X is of Y, increase/decrease, percent change, and percent difference. Live results with step-by-step formulas.

Add, subtract, multiply, and divide fractions with automatic simplification. Supports mixed numbers and shows step-by-step solutions.