Math Calculators

Percentages, fractions, algebra, geometry and statistics. Each calculator shows the formula and step-by-step logic so students and professionals can check the answer by hand.

• Percentage Calculator

  What is X% of Y, X as a percent of Y, and more.

• Percentage Change Calculator

  Percent increase or decrease between two values.

• Percent Error Calculator

  Error between an observed and true value.

• Fraction Calculator

  Add, subtract, multiply or divide two fractions.

• Mean, Median, Mode & Std Dev

  Full statistics for a list of numbers.

• Quadratic Equation Solver

  Solve ax² + bx + c = 0, including complex roots.

• Pythagorean Theorem Calculator

  Find the hypotenuse of a right triangle.

• Triangle Calculator

  Area, perimeter and angles from three sides.

• Circle Calculator

  Area, circumference and diameter from the radius.

• Area Calculator

  Area of rectangles, triangles, trapezoids and ellipses.

• Volume Calculator

  Volume of cubes, boxes, spheres, cylinders and cones.

• GCF & LCM Calculator

  Greatest common factor and least common multiple.

• Prime Number & Factor Calculator

  Check if a number is prime and find its prime factors.

• Exponent & Root Calculator

  Powers, square roots and nth roots.

• Logarithm Calculator

  Log of a number to any base, plus ln and log₁₀.

• Ratio Calculator

  Simplify a ratio and scale it to a new value.

• Rounding & Scientific Notation

  Round to decimal places and convert to scientific notation.

• Weighted Average Calculator

  Average of values with weights (grades, scores, prices).