Area Calculator
Quick floor or wall rectangle for paint, flooring, and sod planning.
Step 1: Units
Step 2
Enter project measurements
Use decimals if needed (e.g. 3.5).
How to use this calculator
Measure perpendicular inside dimensions.
What the math is doing
Area = length × width.
Frequently asked questions
L-shaped rooms?
Split into rectangles and add.
Triangles?
Use one-half base times height separately.
Openings?
Subtract door and window areas from totals.
Stairs?
Treat treads and landings separately.