No one likes when there's a lot of tech debt, right? But how do we understand how much exactly we have of it? Where exactly does it sit? Which part of it is actually the most annoying? What would be the benefit of spending time tackling it? When you plan tackling your tech debt, all these questions deserve answers. Especially when we're asked about the ROI on our efforts. Also, we want to prioritise tech debt items well to spend effort wisely. This talk is about that: how we measure our tech debt, interpret the numbers to get the above questions answered, and take the right decisions after.