Trigonometry Calculator

  • Haversine Distance Calculator
    Calculate the great-circle distance between two latitude/longitude points using the Haversine formula. Results in km, miles, and nautical miles.
  • Triangle Area from Coordinates Calculator
    Find the area of a triangle from the (x, y) coordinates of its three vertices using the Shoelace formula. Free, instant, and shows orientation.
  • Angle to Percent Grade Calculator
    Convert a slope angle in degrees to percent grade instantly. Enter the angle and get the grade (%) and rise-per-run ratio using grade = tan(θ)·100.
  • Vector Components Calculator
    Convert a vector's magnitude and angle into x and y components instantly. Supports degrees or radians using x = r·cos(θ), y = r·sin(θ).
  • Angle of Elevation Calculator
    Find the angle of elevation from height and horizontal distance. Calculates the angle in degrees and radians plus the line-of-sight length.
  • Amplitude, Period & Frequency Calculator
    Find the amplitude, period, frequency, phase shift, and midline of a sinusoidal function y = A·sin(Bx + C) + D instantly.
  • SOH CAH TOA Calculator
    Solve right triangles with SOH CAH TOA. Enter the two legs to get the hypotenuse, angle θ, and the sine, cosine, and tangent ratios instantly.
  • Degrees to Radians Calculator
    Convert angles from degrees to radians instantly. Enter any degree value to get the exact radian measure plus its multiple of pi.
  • Radians to Degrees Calculator
    Convert radians to degrees instantly. Enter any angle in radians and get the exact degree value using deg = rad × 180/π. Free online angle converter.
  • Six Trigonometric Functions and Their Inverses Calculator
    Compute sine, cosine, tangent, cotangent, secant and cosecant of any angle, or find the angle from an inverse trig function. Degrees, radians or gradians.
  • Trigonometric Functions Calculator (Pi Radians)
    Evaluate sin, cos, tan, cot, sec or csc for an angle given as a multiple of pi radians. Enter n and get the exact function value at theta = n times pi.
  • Trigonometric Function Evaluator (Angle in Multiples of Pi Radians)
    Evaluate sine, cosine, tangent, cotangent, secant or cosecant at any angle entered in pi radians, radians, degrees or gradians. Handles asymptotes.
  • Inverse Trigonometric Function Calculator
    Compute arcsin, arccos, arctan, arccot, arcsec or arccsc of a value. Get the principal-value angle in degrees or radians, plus domain and range.
  • Trigonometric Function Calculator
    Evaluate sin, cos, tan, cot, sec or csc for any angle in degrees, radians, gradians or turns. Instant results with pole detection for undefined points.
  • Law of Sines Calculator
    Solve a triangle with the Law of Sines: find a missing angle or side, then get all sides, all angles, perimeter, area, inradius and circumradius.
  • Triangle Theorems Calculator (AAA, AAS, ASA, ASS/SSA, SAS, SSS)
    Solve any triangle from AAA, AAS, ASA, ASS/SSA, SAS or SSS inputs. Get all angles, sides, perimeter, area, inradius and circumradius instantly.
  • Law of Cosines Calculator
    Solve any triangle with the Law of Cosines. Enter three sides (SSS) to find all angles, perimeter, area, inradius and circumradius instantly.
  • Decimal Degrees to DMS Converter
    Convert coordinates between Decimal Degrees (DD), Degrees-Minutes-Seconds (DMS) and Degrees-Decimal-Minutes (DMM). Handles negative GPS lat/long, all six directions.
  • Rise Over Run to Degrees Calculator
    Convert rise over run into a slope angle in degrees. Enter vertical rise and horizontal run to get the angle, percent grade, and ratio instantly.
  • Angle of Impact Calculator
    Calculate the angle of impact of a bloodstain from its width and length using arcsin(width/length). Free forensic bloodstain pattern analysis tool.
  • Azimuth (Bearing) Calculator
    Calculate the initial azimuth (forward bearing) between two latitude/longitude points using the great-circle formula. Returns degrees from true north plus compass point.
  • Hyperbolic Tangent tanh(x) Function and Derivatives Calculator
    Compute tanh(x), its first and second derivatives at any x, or over a range. Free online hyperbolic tangent calculator with formulas and a value table.
  • Second Derivative of tanh(x) Calculator
    Compute the second derivative tanh''(x) of the hyperbolic tangent at any real x, plus tanh(x) and its first derivative. Instant, high-precision results.
  • tanh(x) Hyperbolic Tangent Function Calculator
    Compute the hyperbolic tangent tanh(x) plus its first and second derivatives at any real x. Free, instant, high-precision math activation-function tool.

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