Case 1
- Length in feet
- 12ft
- Width in feet
- 10ft
- Number of areas
- 1
- Area mode
- One rectangle or identical areas
120.00ft²
- Total in square yards
- 13.3333yd²
- Total in square metres
- 11.1484m²
Square Footage Calculator
Change any value to update the result.
120.00ft²
Total area: 120.00 ft²Total in square yards: 13.3333 yd²; Total in square metres: 11.1484 m²
- Total in square yards
- 13.3333 yd²
- Total in square metres
- 11.1484 m²
Personal inputs stay on this device. Sharing sends the calculator page without these values.
Examples
A 12 ft by 10 ft rectangle is 120 ft². Keep the count for identical areas, or choose different rooms and enter each pair of dimensions in metres or feet plus inches. The calculator adds every section and shows square feet, square yards and square metres.
The numbers at a glance
Held fixed: Length in feet 12.00 ft, Width in feet 10.00 ft, Area mode One rectangle or identical areas.
| Number of areas | Total area (ft²) |
|---|---|
| 1Your value | 120.00 |
| 2 | 240.00 |
| 3 | 360.00 |
| 4 | 480.00 |
| 5 | 600.00 |
| 6 | 720.00 |
Worked examples
Case 2
- Area mode
- Different rectangular rooms
- Rectangular rooms
- A: 3.81 × 3.048 m; B: 2.4384 × 2.7432 m
197.00ft²
- Total in square yards
- 21.8889yd²
- Total in square metres
- 18.3019m²
Case 3
- Length in feet
- 2ft
- Width in feet
- 4ft
- Number of areas
- 4
- Area mode
- One rectangle or identical areas
32.00ft²
- Total in square yards
- 3.5556yd²
- Total in square metres
- 2.9729m²
How it's calculated
ft² = length × width × count; different rooms: sum(length × width), using one unit
- StepChoose identical areas or different rectangular rooms.Number of areas=1·Rectangular rooms=A: 3.81 × 3.048 m; B: 2.4384 × 2.7432 m
- StepEnter each dimension; feet and inches have separate fields in the room editor.
- ResultRead each room contribution and the total in ft², yd² and m².120.00ft²
Add non-overlapping rectangular sections. The editor supports up to 20 sections; cut-outs, other shapes and prices are outside this model.
What this number means
For a synthetic example, 12 ft 6 in by 10 ft contributes 125 ft² and 8 ft by 9 ft contributes 72 ft²: together 197 ft². Changing a room's display units preserves its measurement. Empty or invalid sections make the total unavailable.
One square foot is exactly 0.09290304 m². The 20-section limit keeps the editor manageable; it is not a building limit.
Questions
Can I use metres?
Yes. Choose different rooms and set a room to metres. Its contribution and the total still show all three area units.
How do I enter feet and inches?
Enter nonnegative feet and inches from 0 up to, but not including, 12. An entry of 12 inches is flagged; enter the additional foot separately.
What about an L-shaped room?
Split it into non-overlapping rectangles and add each section. This editor does not subtract cut-outs or calculate other shapes.
Sources and last check
- NIST SP 811 B.9: international length and area unitsCalculation convention
Information, not professional advice.