- Fraction Calculator
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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Sine CalculatorCalculate sine values effortlessly with this sine calculator. Input angle in degrees or radians and get precise results. Essential tool for trigonometry and mathematics.
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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.
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Inverse Sine CalculatorEnter a sine value between −1 and 1 to compute its inverse sine (arcsin). Choose degrees or radians and get the angle instantly.
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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.
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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.
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Tangent CalculatorEnter an angle in degrees or radians to get its tangent instantly. See tan(θ) plus the angle shown in both degrees and radians for quick reference.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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Cosh (Hyperbolic Cosine) CalculatorCompute the hyperbolic cosine cosh(x) = (e^x + e^-x)/2 for any real number x instantly with this free online cosh calculator.
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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.
