Why your measurements are always slightly off

Why do parts marked with the same measurement still come out different? This video breaks down the small, easy-to-miss habits and tool assumptions that create gaps, twists, misaligned drawers, and cabinet doors that never sit quite right. We’ll look at how accuracy works as a chain—from tape hooks, pencil marks, parallax, kerf, square cuts, and reference edges to direct transfer methods and repeatable stop block setups. You’ll also see why nominal sizes can mislead, how wood movement changes the game, and how to diagnose patterns when your measurements keep drifting. 0:00 The matching parts mystery 0:58 Accuracy is a chain 2:02 Testing your tape 3:03 The moving tape hook 3:54 Marks and parallax 4:54 Reference errors compound 5:47 Nominal sizes mislead 6:38 Accounting for kerf 7:32 Checking square cuts 8:54 Direct transfer methods 9:45 Repeatable stop block setups 10:36 Wood movement matters 11:35 Use needed accuracy 12:37 Diagnosing error patterns #Woodworking #MeasureTwiceCutOnce #Carpentry #WorkshopTips #WoodworkingTips #DIY #CabinetMaking