Method
How to calculate absolute cost difference per square unit
The comparison removes area differences between quotes. Both area inputs must use the same square unit.
FORMULACost per square unit = total cost ÷ covered area
Worked example
Cost-per-square-foot comparison calculator example
A $4,200 quote covering 900 sq ft equals about $4.67 per sq ft.
Change one assumption at a time to see what drives the result. The output is an estimate, not a quote, forecast or recommendation.
FAQ
Cost-per-square-foot comparison calculator FAQ
What should total cost include?
Use the same cost scope for both options—materials only or fully installed, but not one of each.
Can I compare square metres?
Yes. Use square metres consistently for both area inputs.
Does lower cost per area mean the better quote?
Not necessarily. Specification, quality, warranty and scope exclusions still matter.