Mathematics Calculators
Algebra, geometry and trigonometry with worked solutions. 12 free tools and counting.
Geometry, algebra and trigonometry with the working shown — not just the answer. Solve a quadratic, find a hypotenuse, get the equation of a line through two points, or convert a decimal into an exact fraction. Ideal for checking homework or rebuilding intuition long after the classroom.
Quadratic Solver
Roots of ax² + bx + c = 0, real or complex.
Logarithm Calculator
Logarithm of a number in any base, plus natural and base-10 logs.
Triangle Solver
Area, hypotenuse and angles of a right triangle from two sides.
Trigonometry
sin, cos, tan and their inverses for any angle.
Area Calculator
Area of a circle, rectangle, triangle or trapezoid from its dimensions.
Volume Calculator
Volume of a cube, box, sphere, cylinder or cone from its dimensions.
Pythagorean Theorem
Find the hypotenuse or a missing leg of a right triangle.
Slope Calculator
Slope, line equation, distance and midpoint from two points.
Exponent Calculator
Raise a number to any power, including negative and fractional exponents.
Decimal to Fraction
Convert any decimal to a simplified fraction or mixed number.
Scientific Notation Converter
Convert any number to and from scientific, E and engineering notation.
Percent Error Calculator
Compare a measured value against the true value as a percentage.