Enter the two legs of a right triangle and get a complete solution at once. The tool uses the Pythagorean theorem to find the hypotenuse, then computes the area as one half of leg a times leg b, the full perimeter, and both acute angles using inverse tangent. For legs of 3 and 4 you get a hypotenuse of 5, an area of 6, a perimeter of 12, and angles of about 36.87 and 53.13 degrees that add to 90. A right triangle has one 90 degree corner, which makes it the backbone of trigonometry, roof pitches, ramps and screen diagonals. Enter both legs in any consistent unit and the linear results share that unit while the area is in the unit squared and angles are in degrees. All of the geometry and trigonometry runs locally in your browser at full precision, and the hypotenuse copies with one click.
From the two legs it finds the hypotenuse, area, perimeter and both acute angles of the right triangle.
They come from the arctangent of the ratio of the legs, and the two acute angles always add to 90 degrees.
The area is half the product of the two legs, since the legs act as base and height.
Enter the two legs of a right triangle and get a complete solution at once. The tool uses the Pythagorean theorem to find the hypotenuse, then computes the area as one half of leg a times leg b, the full perimeter, and both acute angles using inverse tangent.
Yes. Right Triangle Calculator is completely free, with no sign-up and no usage limits.
Yes. Right Triangle Calculator runs in any modern web browser. There is nothing to download or install.
Yes. Right Triangle Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.