Developer Utilities
Small developer utilities that save a trip to a random website. Encode and decode Base64, explain a regex, build UTM links, generate QR codes and vCards, and more — the everyday helpers. Free in your browser, and available by API when you need them in a script.
Developer Utilities
Horizontal distance from elevation angle
height ÷ tan(θ), free
POST /trig/distance-from-elevation$0.002Developer Utilities
Law of sines missing side calculator
unknown side from angle-side pair
POST /trig/law-of-sines-side$0.002Developer Utilities
Solve an AAS triangle
angles, sides, and area calculator
POST /trig/solve-aas-triangle$0.002Developer Utilities
Sun elevation angle from shadow calculator
POST /trig/sun-angle-from-shadow$0.002Developer Utilities
Tangent of angle in radians
tan(θ) = sin(θ)/cos(θ) free
POST /trig/tan-radians$0.002Developer Utilities
Power reduction sine squared calculator
sin²(θ)=(1−cos(2θ))/2
POST /trig/power-reduction-sin$0.002Developer Utilities
Product-to-sum cosine calculator
convert cos A cos B
POST /trig/product-to-sum-coscos$0.002Developer Utilities
Pythagorean identity sin cos calculator
find the missing value
POST /trig/pythagorean-identity-sincos$0.002Developer Utilities
Sine of difference of angles calculator
use the sin(A − B) identity
POST /trig/sin-difference$0.002Developer Utilities
Sine half-angle calculator
sin(θ/2) with quadrant sign
POST /trig/sin-half-angle$0.002Developer Utilities
Tangent of difference of angles calculator
tan(A−B) free
POST /trig/tan-difference$0.002Developer Utilities
Tangent double-angle calculator
find tan(2θ) from tan(θ)
POST /trig/tan-double-angle$0.002Developer Utilities
Triangle area from vertex coordinates calculator
shoelace formula
POST /trig/area-coordinates$0.002Developer Utilities
General solution of sine equation
θ = nπ ± form in deg & rad
POST /trig/general-solution-sine$0.002Developer Utilities
Gradians to radians conversion calculator
gon to rad
POST /trig/gradian-to-rad$0.002Developer Utilities
Quadrant of an angle calculator
standard position, free
POST /trig/quadrant-of-angle$0.002Developer Utilities
Solve sine equation calculator
all solutions in degrees
POST /trig/solve-sin-equation$0.002Developer Utilities
Cylindrical to Cartesian coordinates calculator
ρ, φ, z to x, y, z
POST /trig/cylindrical-to-cartesian$0.002Developer Utilities
De Moivre Theorem Power Calculator for Complex Numbers
POST /trig/demoivre-power$0.002Developer Utilities
Degrees minutes seconds arithmetic calculator
add or subtract DMS angles
POST /trig/dms-arithmetic$0.002Developer Utilities
Complex number rectangular to polar form
modulus and argument in degrees
POST /trig/rectangular-to-polar-complex$0.002Developer Utilities
Angular frequency from period calculator
find ω = 2π/T
POST /trig/angular-frequency$0.002Developer Utilities
Triangle area Heron's formula calculator
three sides to area
POST /trig/area-heron$0.002Developer Utilities
Quotient of complex numbers in polar form calculator
POST /trig/complex-quotient-polar$0.002Developer Utilities
Hyperbolic cotangent calculator
compute coth(x)
POST /trig/coth$0.002Developer Utilities
Phase shift of a sinusoidal function
compute −C/B and shift direction
POST /trig/sinusoid-phase-shift$0.002Developer Utilities
Hyperbolic tangent calculator
tanh(x) = sinh(x)/cosh(x)
POST /trig/tanh$0.002Developer Utilities
Gravity components on an inclined plane calculator
POST /trig/incline-component-gravity$0.002Developer Utilities
Resultant of two vectors calculator
magnitude and direction
POST /trig/resultant-two-vectors$0.002Developer Utilities
Hyperbolic sine double-angle calculator
compute sinh(2x)
POST /trig/sinh-double-angle$0.002Developer Utilities
Spherical Law of Cosines for Sides Calculator
POST /trig/spherical-law-of-cosines-side$0.002Developer Utilities
Spherical triangle area from excess
Girard A = R²E calculator
POST /trig/spherical-triangle-area$0.002Developer Utilities
Destination point from bearing and distance calculator
POST /trig/destination-point-bearing$0.002Developer Utilities
Linear speed from angular speed calculator
v = rω
POST /trig/linear-speed-angular$0.002Developer Utilities
Sign of trig function in quadrant calculator
ASTC rule
POST /trig/sign-of-trig-function$0.002Developer Utilities
Tangent from sine and cosine calculator
divide sin by cos
POST /trig/tan-from-sin-cos$0.002Developer Utilities
Triangle perimeter calculator
sum of three sides with inequality check
POST /trig/triangle-perimeter-from-sides$0.002Developer Utilities
Distance by triangulation calculator
baseline and base angles
POST /trig/triangulation-distance$0.002Developer Utilities
Triangle altitude from area and base calculator
find the height
POST /trig/altitude-from-area$0.002Developer Utilities
Beat frequency of two waves calculator
find the audible beat rate
POST /trig/beat-frequency$0.002Developer Utilities
Negative-angle identity calculator
even and odd trig parity
POST /trig/negative-angle-identity$0.002Developer Utilities
Supplementary angle calculator
find the angle that adds to 180°
POST /trig/supplementary-angle$0.002Developer Utilities
Gudermannian function calculator
compute gd(x)
POST /trig/gudermannian$0.002Developer Utilities
Haversine function calculator
hav(θ)=(1−cos θ)/2 = sin²(θ/2)
POST /trig/haversine-function$0.002Developer Utilities
Is it a right triangle checker
three sides, Pythagoras test
POST /trig/is-right-triangle$0.002Developer Utilities
Rafter length from pitch angle and run calculator
POST /trig/rafter-length$0.002Developer Utilities
Resultant course with current calculator
vessel course and ground speed
POST /trig/resultant-course-current$0.002Developer Utilities
Rotate point about a center calculator
free 2D trig
POST /trig/rotate-point-about-center$0.002Developer Utilities
Superposition of two sinusoids calculator
same-frequency phasor sum
POST /trig/superpose-same-frequency$0.002Developer Utilities
Thirty-sixty-ninety triangle solver
find every side
POST /trig/thirty-sixty-ninety$0.002Developer Utilities
2D cross product magnitude calculator
signed determinant
POST /trig/cross-product-magnitude-2d$0.002Developer Utilities
Frequency from period calculator
find cycles per unit interval
POST /trig/frequency-from-period$0.002Developer Utilities
Sagitta of a circular arc calculator
height from radius and central angle
POST /trig/sagitta$0.002Developer Utilities
Along-track distance great-circle calculator
spherical trigonometry, free
POST /trig/along-track-distance$0.002Developer Utilities
Angle Between Two Bearings Calculator
Smallest Difference
POST /trig/angle-between-bearings$0.002Developer Utilities
Evaluate trig expression at an angle
six-function calculator
POST /trig/evaluate-expression-at-angle$0.002Developer Utilities
NATO mils to degrees calculator
artillery angle conversion free
POST /trig/mil-to-degrees$0.002Developer Utilities
Simple harmonic motion position calculator
x(t) = A cos(ωt + φ)
POST /trig/simple-harmonic-position$0.002Developer Utilities
Solar Elevation Angle Calculator
Sun Altitude from Latitude
POST /trig/solar-elevation-angle$0.002Developer Utilities
Solar azimuth angle calculator from latitude, declination and hour angle
POST /trig/azimuth-of-sun$0.002