Need to solve a triangle quickly? Our General Triangle Solver makes it easy to calculate missing sides, angles, area, perimeter, inradius, and circumradius from just three known values. Whether you're working with SSS, SAS, SSA, ASA, AAS, or AAA triangles, this free online calculator provides accurate results in seconds.
The calculator automatically selects the correct method — including the Law of Sines, Law of Cosines, and Heron's Formula — to solve your triangle. It also displays a live visual diagram and step-by-step calculations, making it ideal for students, teachers, engineers, architects, surveyors, and anyone working with geometry or trigonometry.
Simply enter any valid combination of sides and angles, click Solve, and instantly see every missing measurement along with the triangle's area, perimeter, circumradius, and inradius.
