Tapping the main weight text zeros the scale. The amount is also spoken out loud for those too lazy to use their eyes. If you know the density of the object being weighed, this app will also ...

Convert each real length to centimetres, if appropriate. Use a scale of 1 : 20 to find the measurements for a scale drawing of a bedroom. The floorplan of the bedroom measures 3∙4 metres by 2∙ ...