Square Footage Calculator

How the Square Footage Calculator Works

Select your room's shape, choose your preferred unit (feet or meters), then enter the dimensions. The calculator instantly shows the area in both square feet and square meters — no manual conversion needed. For complex rooms, use the L-Shape option by splitting the floor plan into two rectangles.

Common Uses

• Flooring and tiling: Calculate how many boxes of hardwood, laminate, or tile you need. Add 10% for waste and cutting errors.
• Paint coverage: One gallon covers roughly 350–400 ft² (32–37 m²) per coat. Knowing your wall area prevents over-buying.
• Real estate comparisons: Convert between square feet (North America) and square meters (Europe, Asia) when comparing listings.
• HVAC sizing: Air conditioner and heating unit capacity is often specified per square foot. Get the right BTU rating by knowing your room size.

Now Handles Every Room in One Session

The calculator now manages multiple rooms at once. Add as many rooms as you need — living room, two bedrooms, a hallway — give each one a name, enter length and width, and the grand total updates instantly. A global ft/m toggle switches every room at once, so you never convert manually.

The grand total shows in both ft² and m² side by side — useful when your flooring quote is in one unit and your permit application requires the other. Each room also gets a proportional visual panel so you can eyeball relative sizes at a glance. Results are saved in localStorage, so a refresh won't wipe your work. No export or sharing yet — just the numbers you need.

Frequently Asked Questions