Reciprocal Heading Calculator

In aviation, a reciprocal heading is a direction that is 180 degrees opposite of a given heading. It is used to find a course that will take an aircraft directly opposite to its current direction. For example, if an aircraft is flying on a heading of 090 degrees, the reciprocal heading would be 270 degrees.

To calculate the reciprocal heading, you can simply add or subtract 180 degrees from the given heading. If the given heading is less than 180 degrees, add 180 degrees. If the given heading is greater than 180 degrees, subtract 180 degrees.

Reciprocal headings are often used in aviation for a variety of purposes, such as finding a course that will take an aircraft directly opposite its current direction.

For example, A pilot is flying from Chicago to New York. The heading from Chicago to New York is 270 degrees. The pilot needs to know the reciprocal heading in order to fly back to Chicago. The reciprocal heading of 270 degrees is 90 degrees, so the pilot will fly a heading of 90 degrees to return to Chicago.

Here is a table of common reciprocal headings:

Heading	Reciprocal Heading
0	180
30	210
60	240
90	270
120	300
150	330
180	0
210	30
240	60
270	90
300	120
330	150