Pick a tool, type your numbers in, and watch the answer unfold — every line of working written out in plain language.
Two numbers, any of the four operations — negatives and decimals included.
Open tool →Add, subtract, multiply, divide or simplify fractions — answers stay exact.
Open tool →“X% of Y”, “X is what percent of Y”, and percentage increase or decrease.
Open tool →Simplify a ratio, or split a quantity in a given ratio.
Open tool →Lowest common multiple and highest common factor of two or more whole numbers.
Open tool →The mean of a list of numbers, kept exact where possible.
Open tool →Area and perimeter of a rectangle from its length and width.
Open tool →Area and perimeter of a square from one side length.
Open tool →Area and circumference of a circle, exact in π or as a decimal.
Open tool →Area from base and height; perimeter from three sides.
Open tool →Differentiate powers, sums, sin, cos, e^x and ln with the power, product, quotient and chain rules.
Open tool →Limits of polynomials and rational functions, including 0/0 cases that factor, and limits at infinity.
Open tool →Add, subtract, scale, multiply and transpose matrices; 2×2 and 3×3 determinants; 2×2 inverses.
Open tool →sin, cos and tan in degrees or radians with exact standard-angle values, plus a right-triangle solver.
Open tool →Count, sum, mean, median, mode, range, variance and standard deviation — population or sample.
Open tool →Simple probability, AND for independent events, OR for exclusive events, nPr, nCr and binomial.
Open tool →Indefinite and definite integrals of polynomials, 1/x, sin, cos and e^x — with + C and evaluated bounds.
Open tool →Coming later: series, differential equations, integration by parts and substitution, and 3 × 3 inverses.