Math Calculators
Everyday maths to advanced topics — every calculator shows its working.
9 calculatorsPercentage Calculatorpopular
Six modes: X% of Y, what %, % change, increase, decrease, reverse
Scientific Calculatorpopular
Full scientific calc — trig, logs, memory, history, keyboard
Fraction Calculator
Add, subtract, multiply, divide and simplify fractions
Average Calculator
Mean, median, mode, std deviation, quartiles and more
Ratio Calculator
Simplify, solve proportions, compare and divide by ratios
Probability Calculator
Basic events, combinations, permutations, dice, cards, coins
Prime Factorization
Factor tree, all divisors, factor pairs and divisibility rules
LCM & GCD Calculator
LCM and GCD for up to 10 numbers with Venn diagram
Roman Numeral Converter
Convert between Arabic and Roman numerals — 1 to 3,999