One cuerda equals 0.9712 acre, 0.3930 hectare or 3,930.40 square meters. That is the short answer. The longer one matters when you are comparing a listing priced per cuerda with one priced per acre, reading a deed in square meters, or wondering why a five-acre lot is advertised as twenty thousand acres. This reference gives the exact factors, a table for common sizes, worked examples and the errors to watch for.
What a cuerda is
The cuerda is a land unit inherited from Spanish colonial practice and still in official use in Puerto Rico, the only Spanish unit of measure that survives in the island's law. The word means cord or rope, a reminder of how land was once measured. Deeds, the Property Registry, CRIM tax records and most local listings describe rural land in cuerdas, although Act 210-2015 now requires the Registry to state areas in the metric system as well, so modern deeds and surveys give square meters with cuerdas alongside. Mainland portals convert to acres. Because the two units are so close, mainlanders have long called the cuerda a "Spanish acre", and many people treat them as equal in conversation.
The exact conversion factors
- 1 cuerda = 3,930.395625 square meters (the legal definition)
- 1 cuerda = 0.97122 acre = about 42,306 square feet
- 1 cuerda = 0.39304 hectare
- 1 acre = 1.02963 cuerdas = 4,046.86 square meters = 43,560 square feet
- 1 hectare = 2.54427 cuerdas = 2.47105 acres = 10,000 square meters
Rules of thumb: an acre is about 3 percent bigger than a cuerda, and a hectare is about two and a half of either.
Conversion table for common sizes
| Cuerdas | Acres | Hectares | Square meters |
|---|---|---|---|
| 1 | 0.97 | 0.39 | 3,930 |
| 5 | 4.86 | 1.97 | 19,652 |
| 10 | 9.71 | 3.93 | 39,304 |
| 25 | 24.28 | 9.83 | 98,260 |
| 50 | 48.56 | 19.65 | 196,520 |
| 100 | 97.12 | 39.30 | 393,040 |
| 103 | 100.04 | 40.48 | 404,831 |
| 150 | 145.68 | 58.96 | 589,559 |
| Acres | Cuerdas | Hectares |
|---|---|---|
| 1 | 1.03 | 0.40 |
| 5 | 5.15 | 2.02 |
| 10 | 10.30 | 4.05 |
| 25 | 25.74 | 10.12 |
| 50 | 51.48 | 20.23 |
| 100 | 102.96 | 40.47 |
Worked examples
A 100-cuerda finca. Multiply by 0.97122: 100 cuerdas is 97.12 acres. A seller who rounds that to "about 100 acres" is overstating by roughly 3 acres, not a deal-breaker, but worth knowing.
A 100-acre estate. Multiply by 1.02963: 100 acres is 102.96, or about 103, cuerdas. That is the case for the Cayey estate described on this site, which is roughly 100 acres in two parcels, or about 103 cuerdas.
A deed in square meters. A survey shows 196,520 square meters. Divide by 3,930.4 to get 50 cuerdas, or by 4,046.86 to get 48.56 acres.
A hectare figure from a European buyer. 40 hectares is 101.77 cuerdas or 98.84 acres.
A survey that disagrees with the deed. A deed says 50 cuerdas; the new survey measures 186,700 square meters, which is 47.5 cuerdas. The recorded area is 5 percent high, a common result on old rural land. See Property Registry, title and surveys for how such discrepancies are handled.
Comparing price per cuerda and price per acre
Because a cuerda is smaller than an acre, a price per cuerda converts to a slightly higher price per acre. To convert, multiply the price per cuerda by 1.02963 to get the price per acre, or multiply the price per acre by 0.97122 to get the price per cuerda.
- $20,000 per cuerda is about $20,593 per acre.
- $23,750 per acre is about $23,067 per cuerda. That is the headline figure for the Cayey estate at its asking price of $2,375,000 for about 100 acres, before counting the residence, second house and infrastructure included in the price.
When comparing listings, convert everything to one unit first, and make sure both figures describe the same thing: raw land, or land with improvements. For what drives price per acre in the mountains, see Buying a farm or mountain estate in Puerto Rico.
Common listing errors
- Square meters labeled as acres. National land portals that ingest Puerto Rico listings sometimes put the square-meter figure in the acres field. A Cayey lot of about 5 cuerdas has been displayed as "20,791 acres" for $500,000; 20,791 square meters is 5.29 cuerdas.
- Square meters labeled as square feet. The reverse problem: a 12-cuerda parcel, about 47,165 square meters, shown with a lot size of 47,800 square feet, a tenth of its real size.
- Cuerdas labeled as acres. The most common and least harmful: the number is right, the unit is 3 percent off.
- Rounded or inherited areas. An old deed's "100 cuerdas, more or less" may not survive a survey. Trust a current survey over any listing.
The rule is simple: when an acreage looks too good to be true, divide it by 3,930 and see if the answer looks like cuerdas.
Example: about 100 acres, about 103 cuerdas
The Cayey estate is about 100 acres, roughly 103 cuerdas or 40.5 hectares, in two fee-simple parcels at about 2,100 feet, with A-G and B-Q zoning, a remodeled residence, a 550-foot well, a 12,000-gallon cistern, two creeks and Starlink, paying about $990 a year in property tax. It is for sale at $2,375,000, reduced from $2,500,000, for furnished long-term lease at $15,000 per month, or as a lease with option to buy (Stellar MLS PR9124119). See the main page, or arrange a visit.
Frequently asked questions
How many acres is one cuerda?
How many square meters are in a cuerda?
How many cuerdas are in a hectare?
How many acres is 100 cuerdas?
Is a cuerda the same as an acre?
Why do some listings show impossible acreages?
Sources and further reading
- Cuerda and Puerto Rican units of measurement, Wikipedia, citing the legal definition of 3,930.395625 square meters.
- IPUMS USA, acreage variable notes, on the cuerda and its informal treatment as an acre.
- Ex parte Román Quiles, 2025 TSPR 45, Supreme Court of Puerto Rico, noting the metric-area requirement of Act 210-2015.
- Example of a square-meter figure displayed as acres, LandBrokerMLS.
Conversions are computed from the legal cuerda of 3,930.395625 square meters and the international acre of 4,046.8564224 square meters and rounded for display. For legal purposes, rely on the recorded description and a current survey by a licensed Puerto Rico surveyor. Information about the Cayey estate is provided by the owner and should be independently verified.