Dynamic Rounding in Power Query: Easy Method

When dealing with estimated data you will often get numbers with way more precision than you need or even trust. Perhaps your cost estimator says a task will cost $81,944,401.0347 but really anything to the left of that first “9” is pretty meaningless as the numbers are just estimates anyway. Dynamic Rounding (or a Floating Round) will take that $81,944,401.0347 and just keep the part we think is useful $81,900,000.0000. These numbers are for one, easier to look at; but more importantly, rounding them in this way can create gigantic gains in both compression and performance, while causing model size to absolutely plummet. The process is simple, but it isn’t entirely intuitive. Luckily, Brian Grant will walk you through the whole thing, step by step.

Download the companion files here.

Brian Grant

Brian Grant

Brian Grant is a masterful Senior Analytics Consultant by day, and a Power BI legend by night. A passion for Power BI drove him to holistically master the tool from all three perspectives: M, DAX, and the visualization layer. Brian is a constant teacher who leads Power BI training sessions, while sharing his wealth of expertise through video and blogging resources.
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