Square Footage Calculator
Area of any shape in ft², m² and yd², plus cost
About Square Footage Calculator
The square footage calculator measures the area of any space — in square feet, square meters, and square yards at once. Choose your measurement unit (meters, feet, or yards), pick a shape for each area — rectangle, circle, triangle, or a border/L-shape — and enter the dimensions; totals convert to all three units automatically.
Real spaces are rarely one clean rectangle, so you can add as many areas as you need and multiply any of them by a quantity of identical copies — five equal bedrooms, three windows, a run of planter boxes. The border shape subtracts an inner rectangle from an outer one, which handles walkways, frames, and L-shaped rooms.
An optional price per unit area turns the total into a cost estimate, the natural next step when pricing flooring, turf, paint, or land. Perimeter is reported wherever it can be derived. The whole thing runs free in your browser — measure, add, and re-shape as often as you like.
How to use Square Footage Calculator
- Choose your measurement unit: meters, feet, or yards.
- Pick the shape of the first area — rectangle, circle, triangle, or border/L-shape — and enter its dimensions.
- Set a quantity if several identical areas exist, and click “Add another area” for differently shaped sections.
- Optionally enter a price per unit area to get a cost estimate.
- Read the total in m², ft², and yd², plus the perimeter and cost where available.