Decimal-Acre Reference / Sheet 0.025
0.025 Acres = 1,089 sq ft
One fortieth of an acre, and a rare clean case: 1,089 square feet is exactly a 33-foot square. The math is exact: 0.025 multiplied by 43,560 (the international acre constant since the 1959 IYPA) equals 1,089 square feet, or 101.171 square metres.
Pre-loaded at 0.025 acres. Edit either field to recompute. Use survey foot toggle for pre-2022 federal land descriptions only.
Square Feet
1,089
international ft2
Square Metres
101.17
m2
Hectares
0.0101
ha
Derivation: 0.025 acres × 43,560 sq ft per acre = 1,089 sq ft, exactly. Equivalently, one acre divided by 40 is 1,089 sq ft. The constant 43,560 comes from one surveyor's chain (66 ft) multiplied by one furlong (660 ft), formalised internationally by the 1959 International Yard and Pound Agreement.
Sheet 02 · Scale References
What 1,089 square feet looks like
A 0.025-acre parcel is the cleanest small-lot number in the acre system: laid out as a perfect square it measures exactly 33 feet on each side, because 33 times 33 is 1,089. Walk two sides of it and you have covered 66 feet, which is one surveyor's chain, the same 66-foot length that defines the acre itself. Most real 0.025-acre lots are not square, but the total area is what matters, and 1,089 sq ft places this size firmly in the attached-housing and remainder-parcel class.
An NBA basketball court
4,700 sq ft
0.025 ac is 23% of it
A US singles tennis court
2,106 sq ft
0.025 ac is 52% of it
A standard US parking space
162 sq ft
0.025 ac is 6.7× the size
A typical 2-car garage interior
480 sq ft
0.025 ac is 2.3× the size
A 30-foot shipping container footprint
256 sq ft
0.025 ac is 4.3× the size
The most useful comparison is the singles tennis court at 2,106 sq ft: a 0.025-acre lot is a little over half of one. Two side-by-side two-car garages (about 960 sq ft combined) are just under a 0.025-acre footprint. The plot is small enough to walk across in about ten seconds and is, in practice, the footprint of a single attached dwelling rather than a standalone building site with a yard.
Sheet 03 · Where 0.025 Acres Comes From
Why the number appears in records
If you searched ".025 acres to square feet" you almost certainly read the figure on a property document, a tax-assessor record, a real-estate listing, or a survey. A parcel gets reported at 0.025 acres for a few recurring reasons:
- Attached-housing footprints. Condo-mapped townhouse and row-house parcels are often recorded as the building footprint alone, commonly 1,000 to 1,100 sq ft, which rounds to 0.025 acres. The land around the unit is held in common rather than in the individual lot.
- Mobile-home and tiny-home pads. In land-lease and cooperative communities the individual pad or site is frequently platted near 1,089 sq ft, giving each home a defined 0.025-acre area within a larger shared parcel.
- Remainder strips and easements. After a road widening, a sidewalk dedication, or a utility easement, the leftover sliver of land often records at 0.01 to 0.05 acres. These are usually taxable but not independently buildable.
- Small commercial outparcels. An ATM kiosk, a signage parcel, or a utility-cabinet site within a larger development can be carved out at roughly a fortieth of an acre.
Because assessors round acreage to two or three decimal places, a 1,050 sq ft lot, a 1,089 sq ft lot, and a 1,120 sq ft lot can all display as "0.025 acres" on a public-record search. If precision matters, for example when checking property tax per square foot or a lot-coverage ratio against the zoning maximum, pull the recorded plat and use the survey-grade square footage rather than the rounded acreage.
Adjacent Decimal-Acre Pages
Nearby acreages
Sheet 04 · Common Questions