Reports use the page unit as the unit of measurement, not the unit displayed in the space shape. To have the Space Report on a metric drawing match the space shape, change the page unit. For example, when the space shape displayed in the drawing is in square meters and the page unit is set to millimeters, the report shows the area in square millimeters. To change the unit of measurement in the report, on the Page Properties tab in the Page Setup dialog box (File menu), select Meters. Then, run the report. For your drawing to display correctly again, set the page unit back to Millimeters.