- Fraction Calculator
- Matrix Calculator
- Slope Calculator
- Algebra Calculator
- Trigonometry Calculator
- Percentage Calculator
- Probability Calculator
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Arctangent (Arctan) CalculatorFind the angle θ from the opposite and adjacent sides using θ = arctan(opposite/adjacent). Get the result in both degrees and radians instantly.
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Degrees-Minutes-Seconds to Decimal Degrees CalculatorConvert latitude/longitude in degrees, minutes and seconds (DMS) to decimal degrees instantly using decimal = D + M/60 + S/3600.
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Roof Pitch Angle CalculatorConvert roof rise and run into pitch angle in degrees, slope percent, rise:12 pitch, and rafter multiplier. Free, instant roof slope calculator.
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Regular Polygon Area CalculatorCalculate the area of any regular polygon from its number of sides and side length. Also returns apothem, perimeter, and interior angle instantly.
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Linear to Angular Velocity CalculatorConvert linear velocity to angular velocity using ω = v/r. Enter speed and radius to get rad/s and RPM instantly. Free physics calculator.
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Shadow Length & Sun Angle CalculatorCalculate shadow length from the sun's elevation angle, or find the sun angle from an object's height and shadow length using simple trigonometry.
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Law of Cosines Angle CalculatorFind the angle of a triangle from its three side lengths using the law of cosines. Enter sides a, b, and c to get angle C in degrees and radians.
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45-45-90 Triangle Leg from Hypotenuse CalculatorFind the leg length of a 45-45-90 right isosceles triangle from its hypotenuse using leg = hypotenuse / √2. Also returns area and perimeter.
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30-60-90 Triangle Sides from HypotenuseFind the short and long legs of a 30-60-90 right triangle from its hypotenuse. Uses short = h/2 and long = h·√3/2. Instant, accurate results.
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Sine of an Angle CalculatorCalculate the sine of an angle in a right triangle from the opposite side and hypotenuse, then find the angle θ in degrees and radians using arcsine.
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Cosine of an Angle CalculatorCalculate the cosine of an angle in a right triangle from the adjacent side and hypotenuse, plus the angle θ in degrees and radians.
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Degrees to Radians CalculatorConvert degrees to radians instantly. Enter any angle in degrees and get the exact radian value plus its multiple of π using radians = degrees × π / 180.
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Resultant Vector CalculatorAdd 2 or 3 vectors by their X and Y components to find the resultant vector's magnitude and direction angle θ. Free, instant 2D vector addition.
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Vector Magnitude CalculatorCalculate the magnitude (length) of a 2D or 3D vector from its x, y, z components using |v| = √(x²+y²+z²). Fast and accurate.
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Angle of Elevation CalculatorFind the angle of elevation from height and horizontal distance using arctan. Get the angle in degrees, radians, line-of-sight length and slope grade.
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Triangle Area (SAS) CalculatorFind the area of a triangle from two sides and the included angle (SAS) using A = ½·a·b·sin C. Enter sides a, b and angle C in degrees.
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Slope to Angle CalculatorConvert a slope (rise/run) to an angle in degrees using θ = atan(m). Enter rise and run to get the incline angle, slope ratio, and grade percent.
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Projectile Range CalculatorCalculate the horizontal range of a projectile from launch velocity and angle using R = v²·sin(2θ)/g. Also returns max height and flight time.
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Heron's Formula CalculatorCalculate the area of any triangle from its three side lengths using Heron's formula. Get area, semi-perimeter, and perimeter instantly.
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Special Angles Trig Values CalculatorFind exact sin, cos and tan values for the special angles 0°, 30°, 45°, 60° and 90°. Instant trig table with decimals like sin45=√2/2.
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Angle Between Two Lines CalculatorFind the angle between two lines from their slopes (m₁, m₂) using the tangent formula. Get both the acute and obtuse angles in degrees instantly.
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Slope to Degrees CalculatorConvert a slope value (m = rise/run) to an angle in degrees. Free slope-to-degrees calculator using angle = atan(m), with radians and percent grade.
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SOHCAHTOA CalculatorFree SOHCAHTOA calculator. Enter a right-triangle angle and one side to solve the opposite, adjacent, and hypotenuse plus sin, cos, and tan.
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Law of Cosines Third Side CalculatorFind the third side of a triangle from two sides and the included angle (SAS) using the Law of Cosines: c = √(a² + b² − 2ab·cos C).
