**Use this simple calculator to calculate the sine of any real number. Enter the value of the angle, select the angle units between radians and degrees, then press "Calculate". **

Sine is a trigonometric function. The sine of an angle in a right triangle is the ratio of the lengths of the side opposite the angle and the hypothenuse.

This calculator can **only calculate the sine for real numbers**. If you need the sine of a complex number you can use the free online scientific calculator. If you are studying mathematics you may also want to give it a try. It's very complete and great for debugging exercises.