← All calculators
Area calculator
Measure a rectangular room, surface or panel. Include material allowance and a price if useful.
Enter your values
Results change as you type. Changing units preserves the actual length. Numbers are processed locally.
Advanced parameters
Calculated result
—
Area in square feet—
Area incl. allowance—
Estimated materials cost—
How is the result calculated?
A = width × length; A_with_allowance = A × (1 + allowance / 100)
Limits and assumptions
Rectangles only. Irregular rooms need to be split into shapes. Price must be entered manually; no prices or taxes are looked up.
This preview does not send analytics events to servers. Real tracking will be enabled only after privacy and measurement design.