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Powerful Floor Plan Area Calculator

Whether you need to calculate floor plan area for a home appraisal, real estate property, or a home improvement project, RoomSketcher makes it easy. Draw your floor plan and let our powerful floor area calculator do the work!

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2D Floor Plan in the RoomSketcher app showing the Total Area feature with measurements.
Trine Bretteville

✍️ Article Summary:

  • Easily calculate floor area for real estate, appraisals, or home projects using the RoomSketcher app.
  • Total Area feature lets you select rooms, choose from six area types, and get instant, accurate measurements—no manual math needed.
  • Supports multiple standards like ANSI and IPMSC to fit professional requirements.
  • Customize your calculations by including or excluding hallways, stairs, storage, and outdoor zones.
  • Available in square feet or square meters, with the option to display measurements directly on your floor plan.
  • Perfect for professionals like agents, appraisers, and contractors—available with a paid RoomSketcher subscription.

Our floor plan area calculator makes it easier to measure floor areas, especially if the rooms have irregular shapes. Different types of projects and industries require different types of area calculations. This can make using basic calculations both time-consuming and frustrating for professionals.

Why You Need a Floor Plan Area Calculator

Knowing how to calculate floor area is important. It helps you estimate property value and plan your project with confidence. However, measuring can be tricky if the space has odd angles or curves.

That's where the RoomSketcher app comes in. It includes an integrated floor plan area calculator that saves time and improves accuracy.

Meet the Total Area Feature

The different ways of measuring total area with the RoomSketcher app. The same 2D Floor Plan showing the six ways of measuring total area.

The RoomSketcher app includes a powerful floor plan area calculator. It's called Total Area, and it calculates your floor plan area quickly and easily. No more adding, subtracting, and guessing.

Here's how it works:

Multiple Calculation Types

Decide which rooms and areas to include, such as hallways, stairs, storage spaces, and outdoor areas, and customize your calculation to suit your project. This will give you more flexibility and ensure greater accuracy.

This flexibility means you can meet area requirements like:

  • ANSI (American National Standards Institute)
  • IPMSC (International Property Measurement Standards Coalition)

There are many calculation types available, but here is a rundown of three of them:

Grand Total Area:

2D Floor Plan drawing showing Grand Total Area in the Total Area measurement tool marked in blue showing which areas that are included in the measurement.

Grand Total Area refers to the zones marked as primary, secondary, and outdoor, as well as all walls.

Internal Zone Area:

2D Floor Plan drawing showing Internal Zone Area in the Total Area measurement tool marked in blue showing which areas that are included in the measurement.

Internal Zone Area refers to only the zones marked as primary and secondary. It does not include any walls or outdoor areas.

Primary Area:

2D Floor Plan drawing showing Primary Area in the Total Area measurement tool marked in blue showing which areas that are included in the measurement.

Primary Area includes all zones marked as primary and walls within the primary areas.

Calculate Square Feet or Square Meters

The RoomSketcher app calculates floor area and room sizes in square meters or square feet. You can display these on your floor plan or use them for reference.

Once you've calculated measurements, you can add them to each room on your floor plan and share the floor plan with clients or colleagues.

See It in Action:

Who Is It For?

The RoomSketcher floor plan area calculator is perfect for:

Frequently Asked Questions (Q&A)


Tablet view of the RoomSketcher app displaying a 2D floor plan of an apartment layout with labeled rooms and dimensions, including Living Room, Kitchen, Dining Room, Bedroom, Bathroom, Laundry, Closet, Hall, and Balcony. The right side shows a scrollable library of door styles available for placement in the design.

Start Calculating Today

Ready to create accurate, professional floor plans? The total area feature is available with a paid RoomSketcher subscription. Explore RoomSketcher subscriptions and start your project today. With an upgraded account, you can:

  • Use advanced measurements and Total Area
  • Generate, download, and print high-quality floor plans
  • Order floor plans at a discount
  • Get an expanded furniture library and use Replace Materials
  • Take 3D Photos, 360 Views and use Live 3D

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