Sine Calculator

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".

The sine function

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.