How do you figure out arc seconds?

Arc seconds are a unit of angular measurement where one degree is divided into 60 minutes, and each minute is further divided into 60 seconds. To calculate arc seconds, you can multiply the number of degrees by 3600 (since 1 degree = 3600 arc seconds). When working with angles in other formats, convert them to degrees first, then use the conversion to arc seconds. For example, if you have an angle of 1.5 degrees, you would calculate it as 1.5 × 3600 = 5400 arc seconds.