The formula to calculate the value of the golden ratio is ϕ (phi) = (1+√5) / 2. In design contexts, the golden ratio can be useful in designing logos, shapes, and aesthetic layouts. Design-wise, the golden ratio can be calculated by dividing your line into two parts ensuring the longer line divided by the shorter line equates to the sum of both the parts divided by the long line. If you struggle with the details, you can always make use of an online Golden Ratio calculator.