✨ Free Online Tool

Square Foot Calculator App

Use the Square Foot Calculator app page to calculate area quickly for rooms, floors, walls, lots, and project materials.

9+
Specialized Tools
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Free to Use
Instant
Calculations
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Square Foot Calculator App

ft
ft
Total Area
0
sq ft

All Square Foot Calculators

Choose a specialized calculator for your specific project type.

🏠
Room Calculator
Calculate the square footage of any room. Includes presets for bedrooms, kitchens, bathrooms, and more.
Calculate Room Area →
🪵
Flooring Calculator
Figure out how much flooring material you need, including a waste factor for hardwood, laminate, vinyl, or carpet.
Calculate Flooring →
🔲
Tile Calculator
Calculate area and the exact number of tiles needed based on tile size and grout gap spacing.
Calculate Tiles →
🪨
Concrete Calculator
Calculate the area and volume of concrete needed in cubic yards, with adjustable depth/thickness.
Calculate Concrete →
🧱
Wall Calculator
Measure wall area for painting, wallpaper, or siding. Supports multiple walls and door/window deductions.
Calculate Wall Area →
📐
Triangle Calculator
Calculate square footage for triangular spaces using base and height, with support for different triangle types.
Calculate Triangle →
🔷
Odd Shapes Calculator
Calculate area for irregular and L-shaped rooms by combining multiple rectangles, triangles, and circles.
Calculate Odd Shapes →
📏
Feet & Inches Calculator
Enter dimensions using separate feet and inches fields for precise measurements without decimal conversion.
Calculate with Inches →
🗺️
Map Calculator
Draw shapes on an interactive map to calculate the square footage of land, lots, and properties.
Calculate on Map →

Square Footage Formulas at a Glance

This app-style square foot calculator gives you instant results for the most common area calculations. Use the tabs to switch between shape types.

Rectangle: L × W  |  Circle: π × r²  |  Triangle: ½ × B × H

All calculations convert automatically to square meters, square yards, square inches, and acres. Bookmark this page for quick on-site measurements on your phone or tablet.

Multi-Room Total

To calculate the total area of multiple rooms, calculate each room separately and add the results. For flooring projects, add a 10–15% waste factor to the combined total.

How to Use This Square Footage App

  1. Choose a shape: Rectangle, circle, or triangle using the shape tabs.
  2. Select your unit: Feet, inches, meters, or centimeters.
  3. Enter dimensions: Type your measurements into the input fields.
  4. See instant results: Area updates live as you type — no button press needed.
  5. Copy the result: Note the square footage for your shopping list or quote.

Quick Square Footage Reference

Room TypeAvg. SizeSq Ft
Bathroom8 × 5 ft40 sq ft
Bedroom12 × 12 ft144 sq ft
Living Room16 × 20 ft320 sq ft
Kitchen12 × 14 ft168 sq ft
Garage (2-car)20 × 24 ft480 sq ft

Frequently Asked Questions

Use this mobile-friendly square footage calculator. Enter your dimensions and get an instant result — no app download needed. Bookmark this page for quick access on any device.

This calculator supports rectangles, circles, and triangles. Use the shape tabs to switch between them. For complex shapes, use our odd shapes calculator.

Calculate each room individually, note the results, then add them together for a total. Our room calculator includes presets for common room types.

Yes. Select meters or centimeters from the unit tabs. The result converts to sq ft, sq meters, sq yards, and more simultaneously.

Yes. All calculators on this site are 100% free, with no login, registration, or subscription required.