Area Calculator — Measure Rooms and Houses Instantly

Why Use an Area Calculator?

Calculating room and house area is essential for:

• Real Estate: Determining property value and listing square footage
• Flooring: Estimating how much tile, carpet, or hardwood you need
• Painting: Calculating wall area for paint coverage
• Furniture: Planning room layouts
• HVAC: Sizing air conditioning units

Our Area Calculator handles single rooms or multiple rooms to give you a complete house total.

How to Use the Area Calculator

1. Add a Room: Enter a room name (e.g., "Living Room")
2. Enter Dimensions: Input length and width
3. Select Unit: Choose Feet, Inches, or Meters
4. Add More Rooms: Click "Add Another Room" for multi-room calculations
5. View Total: The sidebar shows the combined area in both sq ft and m²

Calculation Methods

Square/Rectangle Rooms

• Area = Length × Width
• This is the most common room shape

L-Shaped Rooms

For L-shaped rooms, divide the room into two rectangles:

• Calculate each rectangle's area separately
• Add them together

Irregular Rooms

• Break the room into smaller geometric shapes
• Calculate each shape's area
• Sum the total

Unit Conversions

Our calculator handles:

Tips for Accurate Measurements

• Use a laser measure for the most accurate readings
• For large rooms, measure twice to be sure
• Include alcoves and bay windows in your measurements
• For flooring, add 10% extra for cuts and waste
• When measuring for paint, consider wall height (we'll add a paint calculator soon!)

Try our free Area Calculator →