Area216ft²
Home & Cooking
Square Footage Calculator
Find area for rectangles, triangles, or circles in common units.
Your project
Add every area you need to measure
About this tool
A straightforward square footage calculator
Find area for rectangles, triangles, or circles in common units. Each named rectangle, triangle, or circle uses its correct area formula, then all spaces are combined and converted with exact constants.
Measurements are treated as exact inputs; real project estimates should account for irregular edges and measurement tolerance. Inputs are processed in your browser, and changing a value updates the result immediately.
How it works
Use the Square Footage Calculator in three steps
- 1Enter your values
Add every space in the project, choose its shape, and enter dimensions in feet or meters.
- 2Check the setup
Choose the units or calculation mode that matches your situation.
- 3Use the result
See each area separately plus combined square feet, square meters, square yards, and acres.
Common questions
Square Footage Calculator FAQ
How does the Square Footage Calculator work?
Each named rectangle, triangle, or circle uses its correct area formula, then all spaces are combined and converted with exact constants.
What information do I need?
Add every space in the project, choose its shape, and enter dimensions in feet or meters.
How accurate is the result?
Measurements are treated as exact inputs; real project estimates should account for irregular edges and measurement tolerance.