Dewalt laser distance measures 50100m dewalt dw03050 xj this 50m laser distance measure from dewalt has been designed to calculate area and volume with automatic calculations that make job estimates quick and easy indirect height measurement uses pythagoras to measure distances even when point a andor point b isnt accessible for linear measurement the laser distance measure features a memory unit that stores the last 5 measurements and a 2 line backlit display helps improve screen vis