Square Foot Calculator Multiple Rooms
Calculate the combined square footage of multiple rooms. Add unlimited rooms with their own dimensions and get the total area.
Multiple Rooms Calculator
Add as many rooms as you need. Each room is calculated and totaled separately.
Room 1
Room 2
How to Calculate Square Footage of Multiple Rooms
When you need the total square footage of several rooms — for flooring, painting, or HVAC — measure each room separately and add the results.
Method
- List all rooms you need to measure.
- Measure length × width for each room in the same unit.
- Calculate individual areas for each room.
- Sum all areas for the combined total.
Example
Living room: 18 × 14 = 252 sq ft
Bedroom: 12 × 11 = 132 sq ft
Hallway: 15 × 4 = 60 sq ft
252 + 132 + 60 = 444 square feet (41.25 sq m)
Add 10% waste: 444 × 1.1 = 488 sq ft of material to order.
Pro Tips
- Add 10% extra when ordering materials for waste and cutting.
- For irregularly shaped rooms, split them into rectangles first.
- Note room names to keep your breakdown organized.
Frequently Asked Questions
How do I calculate total square footage for multiple rooms? +
Measure each room's length × width, calculate individual areas, then add all areas together for the total.
How much extra flooring should I order? +
Order 10% extra for standard rooms and 15% extra for rooms with complex cuts, diagonals, or patterns.
Can I mix different units for different rooms? +
Use the same unit for all rooms to ensure accurate totals. Convert all measurements to feet before calculating.