Category
Math
Percentages, fractions, averages
Fraction Calculator
Add, subtract, multiply, divide, simplify, convert, and compare fractions with step-by-step solutions.
Ratio Calculator
Solve ratio proportions a:b = c:d. Enter three values and find the missing one with step-by-step working.
Cross Multiplication Calculator
Solve proportions (a/b = c/d) by cross-multiplying — enter any three values and get the fourth with step-by-step working.
Random Number Generator
Generate one or many random numbers in any range. Integers or decimals, unique or repeatable, with optional reproducible seed.
Rounding Calculator
Compare six rounding methods side by side — half up, half down, banker's, ceiling, floor, and truncation.
Average Calculator
Compute arithmetic, geometric, harmonic, and weighted means, with median, mode, standard deviation and box plot.
Weighted Average Calculator
Calculate weighted averages with per-row contribution percentages and formula breakdown.
Long Division Calculator
Divide any two numbers and see the bus-stop work, step-by-step explanation, and decimal/fraction/mixed forms — including repeating-decimal detection.
Prime Factorization Calculator
Find all prime factors of a number with factor tree visualization and exponent notation.
Factor Calculator
Find all factors and factor pairs of a number with prime, composite, and perfect number detection.
LCM Calculator
Find the Least Common Multiple (LCM) of 2–10 numbers using prime factorization and GCF methods.
GCF Calculator
Find the Greatest Common Factor (GCF), LCM, or simplified ratio of any list of integers.
Scientific Calculator
Full-featured scientific calculator with trigonometric functions, logarithms, memory, and DEG/RAD mode.
Basic Calculator
Simple four-function calculator with chain calculations, percentage, and keyboard support.
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