Math Calculators

Calculate percent of a number, percentage change, and percent difference between two values — with reverse solving for base, part, and percent supported.

Free online scientific calculator with trigonometry, logarithms, exponents, square roots, factorials, parentheses, and memory — no download or install needed.

Add, subtract, multiply, divide, and simplify proper, improper, and mixed fractions with automatic reduction to lowest terms and decimal equivalents shown.

Simplify ratios to lowest terms and solve for a missing term in a proportion (A:B = C:D) from any three known values — perfect for recipes, maps, and scale.

Generate random integers within any minimum and maximum range, with or without duplicates, for raffles, lotteries, sampling, and quick decision making.

Compute sample and population standard deviation, variance, mean, and sum of squares from any comma or space-separated dataset with step-by-step results.

Compute mean, median, mode, range, variance, and standard deviation from any list of numbers to quickly summarize a dataset with descriptive statistics.

Round any number to a chosen decimal place, whole number, or significant figures using standard, banker's, ceiling, or floor rounding modes side by side.

Compute powers, roots, and exponents with any positive, negative, decimal, or fractional base and exponent — including a^b, cube roots, and nth roots.

Find the greatest common factor (GCF) and least common multiple (LCM) of two or more integers with prime factorization steps shown for each input value.