- Fraction Calculator
- Matrix Calculator
- Slope Calculator
- Algebra Calculator
- Trigonometry Calculator
- Percentage Calculator
- Probability Calculator
-
Tanh (Hyperbolic Tangent) CalculatorCalculate the hyperbolic tangent tanh(x) of any number instantly, plus sinh(x) and cosh(x), using the exact exponential definition.
-
Tangent Angle CalculatorCalculate the angle θ from the opposite and adjacent sides of a right triangle using θ = atan(opposite/adjacent). Get the result in degrees and radians.
-
Tangent Ratio CalculatorCalculate the tangent ratio of an angle in a right triangle from the opposite and adjacent sides, plus the angle in degrees. Free trig tool.
-
Tan-1 (Arctangent) CalculatorFree arctangent calculator. Enter any value x to find tan-1(x) = atan(x), the inverse tangent, instantly in both degrees and radians.
-
Obtuse Triangle CalculatorSolve a triangle from two sides and the included angle. Find the third side, area, perimeter, all angles, and whether the triangle is obtuse.
-
Oblique Triangle CalculatorSolve any oblique (non-right) triangle from 3 known parts using the law of sines and law of cosines. Find missing sides, angles, perimeter and area.
-
Pythagoras Triangle CalculatorCalculate the hypotenuse of a right triangle from its two legs using the Pythagorean theorem c = √(a² + b²). Also shows area and perimeter.
-
Polar to Rectangular Coordinates CalculatorConvert polar coordinates (r, θ) to rectangular (x, y) instantly. Supports degrees or radians using x = r·cos θ and y = r·sin θ.
-
Polygon Interior Angle CalculatorCalculate the sum of interior angles and each interior/exterior angle of any polygon by entering the number of sides. Free, instant, and accurate.
-
Polar Form CalculatorConvert a complex number a + bi to polar form. Get magnitude r and angle θ in degrees and radians instantly with this free calculator.
-
Triangle Interior and Exterior Angles CalculatorFind the third interior angle and all three exterior angles of any triangle from two known interior angles. Uses the 180° angle-sum rule.
-
Missing Side of a Right Triangle CalculatorFind the missing side of a right triangle using the Pythagorean theorem. Solve for the hypotenuse or a leg from any two known sides instantly.
-
Isosceles Triangle Angles CalculatorFind the missing angles of an isosceles triangle. Enter a base angle or the vertex angle and instantly get the remaining angles.
-
Inscribed Angle CalculatorCalculate the inscribed angle of a circle from its central angle. The inscribed angle equals half the central angle subtending the same arc.
-
Spherical to Cylindrical Coordinates ConverterConvert spherical coordinates (r, theta, phi) to cylindrical coordinates (rho, theta, z) using the physics/ISO convention. Supports degrees or radians.
-
Cylindrical to Spherical Coordinates ConverterConvert 3D cylindrical coordinates (rho, theta, z) to spherical coordinates (r, theta, phi) instantly, in degrees or radians, with the exact formulas shown.
-
Spherical to Cartesian Coordinates ConverterConvert 3D spherical coordinates (r, theta, phi) to Cartesian (x, y, z). Theta is azimuth, phi is polar. Choose degrees or radians.
-
Cartesian to Cylindrical Coordinates ConverterConvert 3D Cartesian coordinates (x, y, z) to cylindrical coordinates (rho, theta, z). Choose degrees or radians for the angle. Uses atan2 for correct quadrant.
-
Cylindrical to Cartesian Coordinates ConverterConvert 3D cylindrical coordinates (rho, theta, z) to Cartesian (x, y, z) instantly. Supports degrees or radians. Free online coordinate converter.
-
Cartesian to Spherical Coordinates ConverterConvert 3D Cartesian coordinates (x, y, z) to spherical coordinates (r, theta, phi). Output angles in degrees or radians. Free online math tool.
-
Double Angle Identities CalculatorCompute sin(2θ), cos(2θ) and tan(2θ) from any angle in degrees or radians using the trigonometric double angle identities. Free and instant.
-
Double Angle CalculatorCompute sin(2x), cos(2x) and tan(2x) instantly with the double-angle formulas. Enter any angle in degrees or radians and get exact decimal values.
-
Cos 2 Theta CalculatorCompute cos(2θ) for any angle in degrees or radians using the double-angle identity cos(2θ)=cos²θ−sin²θ. Shows cos θ and sin θ too.
-
Cosine Rule Triangle CalculatorSolve a triangle with the law of cosines. Enter two sides and the included angle to find the third side, remaining angles, perimeter, and area.
