TRXL Live: Formula Finder for Revit with Paul F. Aubin — Show & Tell

​No slides. No pitch deck. Paul Aubin brings the Formula Finder, a physical rotating dial for the right-triangle and circle/arc formulas you need in the Revit Family Editor, and uses it live. Paul calls it "the Revit version of SOH-CAH-TOA."

​What we're covering:

​Circle Solver Know two values from a circle or arc and the dial shows the formulas that connect them.

​Triangle Solver Same approach for right triangles. Turn the dial to the two values you know and read off the formula, already in Revit syntax.

​Beyond the tool, we'll get into formula tactics: how to work out which value you're really solving for, and why understanding what you're building still matters when an AI chat is one tab away. Paul types the formulas into Revit live, a phone camera shows the dial up close, and your chat questions go on screen. Ask away.

​About the Formula Finder It started as a cheat-sheet page in the 2014 book Renaissance Revit, Paul's deep dive into the family editor. A reduced desk copy became too small to read, so it became a rotating dial that shows only the information you need. It doesn't replace digital tools. It costs zero tokens, and it saves you one browser tab.

​About Paul Aubin Paul F. Aubin is a Revit author and educator.

​Back Formula Finder on Kickstarter (campaign runs Nov 3 to Nov 24, 2026). Two reward tiers include a custom family-editor workshop plus a packet of Formula Finders, and this demo is a preview of that format. Paul is also open to branded versions for firms and schools down the road. https://www.kickstarter.com/projects/paulaubin/formula-finder-for-revit-by-paul-f-aubin

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​TRXL: https://trxl.co #Revit #AEC #BIM #Architecture #Kickstarter