Calculator
Type the whole expression and get the result instantly, brackets and functions included.
Mathematics calculators
Percentage, fraction, equation, power, matrix and calculus tools.
Tools in this category
Percentage
The four most common percentage calculations in a single tool.
Scientific
Trigonometry, logarithms, exponentials and factorials, with a degrees/radians switch.
Rule of three
Solve direct and inverse proportions by entering the three known values.
Average
Paste your list of numbers and get the mean, median, mode, range and standard deviation.
Fractions
Add, subtract, multiply or divide two fractions and get the result already simplified.
Quadratic equation
Solve ax² + bx + c = 0 with the discriminant, both roots and the parabola vertex.
Areas
Calculate the area and perimeter of squares, circles, triangles, trapezoids and ellipses.
Equations
Solve equations of the form ax + b = c and check the answer automatically.
Powers
Raise any number to an integer, decimal or negative exponent.
Pythagoras
Find the hypotenuse or a leg of a right triangle, with area and perimeter.
Roots
Calculate roots of any index, including negative numbers with an odd index.
Volume
Volume and surface area of cubes, spheres, cylinders, cones, prisms and pyramids.
GCD
Find the GCD of two or more whole numbers using Euclid’s algorithm.
LCM
Compute the LCM of several numbers to add fractions or synchronise repeating cycles.
Mathematics
This section covers everything from everyday arithmetic to differential calculus. Every tool shows the formula it applies and a worked example, so you can verify the result by hand.
Looking for a specific operation? Type its name in the search box — common synonyms (GCD, nth root, per cent) are indexed too.