Calculadoras
De porcentagens e médias a números primos, fatoriais e equações do segundo grau, estas calculadoras resolvem a matemática do dia a dia com resultados claros passo a passo. Respostas exatas para estudantes, professores, engenheiros e consumidores.
Percentage Calculator
Three percentage problems solved: of, is-what-percent, and change.
Average Calculator
Mean, median, mode, range and standard deviation in one step.
GCD & LCM Calculator
Greatest common divisor and least common multiple of any numbers.
Prime Number Checker
Test primality and get the full prime factorisation.
Factorial Calculator
Compute n! exactly — even for huge numbers — with digits count.
Logarithm Calculator
Compute logs in any base — 2, e, 10 or custom.
Exponent Calculator
Raise any number to any power, including negatives and fractions.
Square Root Calculator
Square roots and any nth root, to high precision.
Quadratic Equation Solver
Solve ax² + bx + c = 0 with discriminant and complex roots.
Number to Words Converter
Write numbers in words — international and Indian systems.
Ratio Calculator
Simplify ratios and solve for the missing value A:B = C:?
Rounding Calculator
Round numbers up, down or to decimal places — all methods compared.
Fraction Simplifier
Reduce fractions to lowest terms, with decimal and mixed output.