Chain formulas together so that the result of solving one formula is fed as input to some other formula
Avoid re-typing quantities that are used as input values in multiple places
The values of all variables in a link always match - if any value is changed, the other variables are automatically updated.
Restrictions on linking variables
Any number of variables can be in a link as long as these restrictions are adhered to:
All variables in the link must have compatible units
For example, you can link a variable with ‘inches’ units to one with ‘centimeters’, but not to ‘kilograms’
Links cannot contain input and output variables that would cause an endless loop when solving a formula:
Formulas may not be cross-linked so that their solved (output) variables are linked to each other’s input variables
This would result in an endless loop if the 1st formula were solved. The 2nd formula’s linked input variables would also be updated, causing the 2nd formula to be solved. This would in turn update the 1st formula’s input variables, causing it to be solved again, and so on.
A formula’s output variable may not be linked to any of its input variables.
Only one output variable may be in a link.
The Solver will prevent you from making any links that would violate these constraints by disabling the corresponding ‘link’ button.
Making a link
Click on the button for the variable you want to link.