Everyday Math

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

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.

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

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

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.

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.

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

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 grade point average on the 4.0 scale, weighted by credit hours, from letter or numeric grades across any number of courses in a semester or year.

Compute your final class grade from assignment weights and scores, plus the minimum score needed on remaining work to reach a target letter grade or percent.