Equal-area lots can have different boundary lengths:
| Example rectangle |
Complete perimeter |
| 50 × 100 ft |
300 ft |
| 40 × 125 ft |
330 ft |
| 25 × 200 ft |
450 ft |
| 80 × 62.5 ft |
285 ft |
The formula is 2 × (width + length). These geometric perimeters are not fence-order quantities; an actual project needs measured boundaries, intended coverage and openings.
Using NIST's foot and acre definitions:
- 5,000 × 0.3048² = 464.5152 m²
- 5,000 ÷ 43,560 ≈ 0.114784 acre
A quarter acre contains 10,890 square feet, so a 5,000-square-foot area is approximately 45.9% of a quarter acre.
For another comparison, 3,000 square feet is 60% of this area. Going from 3,000 to 5,000 adds 2,000 square feet, an increase of about 66.7%.
How big are 5,500 and 5,600 square feet?
With a fixed width of 50 feet, the three areas are easy to compare:
| Area |
Example dimensions |
Square meters |
| 5,000 sq ft |
50 × 100 ft |
464.5152 m² |
| 5,500 sq ft |
50 × 110 ft |
510.96672 m² |
| 5,600 sq ft |
50 × 112 ft |
520.257024 m² |
5,500 square feet is 10% larger than 5,000 square feet. In this example, extending the 50-foot-wide rectangle by ten feet adds 50 × 10 = 500 square feet.
5,600 square feet is 12% larger than 5,000 square feet. Extending the reference rectangle by twelve feet adds 50 × 12 = 600 square feet.
If the spaces are square instead, their sides measure approximately 74.16 feet for 5,500 square feet and 74.83 feet for 5,600 square feet. Those values come from the square roots of the stated areas; the rectangular dimensions above are not the only possibilities.
The difference between 5,500 and 5,600 square feet is 100 square feet, equivalent in area to a 10 × 10-foot square. These comparisons describe area, not a guaranteed extra room or usable portion of a property.