Free area calculator

Multiple Rooms Square Footage Calculator

Multiple Rooms Square Footage Calculator: Add rooms with their own names, lengths, and widths, then get one combined square footage total. Use Add Room

Multiple Rooms

Material Waste FactorOPTIONAL

Estimate Material CostOPTIONAL

Calculation Results

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1 ft (12 in) 1 ft 1 ft² = 144 in²

Add and Sum Multiple Rooms Instantly

Select the Multiple Rooms shape to add unlimited room rows, each with its own optional name, length, and width. Click Add Room to add another row, or the × button to remove one. Click Calculate and the tool sums every valid row into one combined square footage. You do not need to add the numbers yourself.

The Quantity field is hidden for this shape since each row already represents one room. For flooring or paint projects covering an entire home, add a row for every room and hallway, then use the Material Waste Factor and Estimate Material Cost sections for a complete project estimate.

How It Works

1

Select Shape

Choose the shape that matches your space.

2

Enter Dimensions

Enter measurements in any unit. Add quantity, waste factor, and material price if you need them.

3

Get Results

See area in ft², in², yd², m², and acres, plus a cost estimate when you enter a price.

Frequently Asked Questions

Select Multiple Rooms, then enter length and width for each row. Click Add Room for more rows. There is no limit. Click Calculate and the tool adds every valid row into one total.
Yes. That is what this mode is for. Each row has its own length and width, so a 10×12 bedroom and a 14×16 living room can go in one calculation with no manual math.
For flooring, yes. Hallways need flooring too. Add each hallway as its own row (length × width) with your rooms. For paint-only room totals, you can skip hallways.
Click the × button on the right of any row to remove it. The list always keeps at least one row. Clear resets the list to two empty rows.
Add a row for every room, hallway, and closet that needs flooring, then click Calculate. Open Material Waste Factor and enter 5 to 15% to include extra for cuts and fitting.
No. Quantity is hidden in Multiple Rooms mode because each row is already one room. For several identical rooms, add one row per copy.
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