Square Foot Calculator Multiple Rooms
Calculate combined square footage of multiple rooms at once. Add unlimited rooms with custom dimensions — instant total in sq ft and m².
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.