The AIM Economic Impact Toolkit is an excellent resource in these times of severe cuts. By using this toolkit, you can calculate the value of your own museum in your own local area, providing a useful advocacy tool and enabling you to make your case to economic, political and tourism stakeholders.
I have developed an easy Excel spreadsheet form where you can just fill in the blanks, and the document will do the maths for you. Please read the instructions document alongside the worksheet. If you wish to follow the the orginal PDF document, this is also available below.