https://community.graphisoft.com/t5/Collaboration-with-other/How-to-multiply-the-exposed-surface-area-with-a-factor-in/m-p/254977#M33299 You can't do any calculations in the interactive schedules, other than simple summation of columns.<BR /> <BR /> What you will need to look into is expressions in properties (search these forums and Archicad help).<BR /> You can associate a property to your elements )Walls and slabs).<BR /> This property can contain an expression (formula) that can calculate the figure you are after - i.e. multiply the surface area by the labour/waste factor.<BR /> You may need more than one property which is fine, and these properties can be used in expressions of other properties.<BR /> You can then schedule the resulting property rather than the surface area.<BR /> <BR /> <BR /> Barry. Fri, 26 Jun 2020 01:24:06 GMT Barry Kelly 2020-06-26T01:24:06Z https://community.graphisoft.com/t5/Collaboration-with-other/How-to-multiply-the-exposed-surface-area-with-a-factor-in/m-p/254976#M33298 <DIV class="actalk-migrated-content"><T>Hello <BR /> I am working with Tiles estimation. I got the Tiles area using the field name ( exposed surface area) . Now I need to multiply this area with some factors . (such as labor factor/ wastage factor / ...) <BR /> How can I do this . Can anyone please help me ? My schedule is attached here</T></DIV> Thu, 25 Jun 2020 11:51:27 GMT https://community.graphisoft.com/t5/Collaboration-with-other/How-to-multiply-the-exposed-surface-area-with-a-factor-in/m-p/254976#M33298 Anonymous 2020-06-25T11:51:27Z https://community.graphisoft.com/t5/Collaboration-with-other/How-to-multiply-the-exposed-surface-area-with-a-factor-in/m-p/254977#M33299 You can't do any calculations in the interactive schedules, other than simple summation of columns.<BR /> <BR /> What you will need to look into is expressions in properties (search these forums and Archicad help).<BR /> You can associate a property to your elements )Walls and slabs).<BR /> This property can contain an expression (formula) that can calculate the figure you are after - i.e. multiply the surface area by the labour/waste factor.<BR /> You may need more than one property which is fine, and these properties can be used in expressions of other properties.<BR /> You can then schedule the resulting property rather than the surface area.<BR /> <BR /> <BR /> Barry. Fri, 26 Jun 2020 01:24:06 GMT https://community.graphisoft.com/t5/Collaboration-with-other/How-to-multiply-the-exposed-surface-area-with-a-factor-in/m-p/254977#M33299 Barry Kelly 2020-06-26T01:24:06Z