How to CALCULATE CORD LENGTH for macrame projects

I don't use calculations or formulas; I estimate cord length based on experience, as I don't weave large projects. In this video I present one option, not claiming it's the only correct method. When I started weaving, I used this approach because it seemed logical, even though it's not fast. I remained calm and ensured the cord wouldn't run out. I encourage viewers to try calculating only once and then rely on visual estimation. I'd love to hear your opinions and methods.