What is a cuerda of land in Puerto Rico?
The cuerda is Puerto Rico's land measure. Nearly everyone uses it and very few people know where it comes from, which is fine until the day you have to compare a lot against one measured in acres or metres.
Where it comes from
A cuerda is a square one hundred varas by one hundred varas. The vara is an old Castilian unit, and that's the whole origin: the cuerda arrived with the Spanish system of measures and stayed put while the rest of the world moved to metric or to the English system.
In square metres, the cuerda is handled as 3,930.395 m². Being a customary measure, some sources quote the last decimal differently; for anything legal, the figure that governs is the surveyor's and the one on the deed, not a conversion off the internet.
It looks like an acre, and that's the trap
A cuerda is slightly less than an acre — about 0.97 — and that closeness is exactly what makes it dangerous. People treat them as equivalent in conversation, and on a small lot the difference is invisible.
On a farm it isn't. Across twenty, fifty or a hundred cuerdas, that three percent becomes whole cuerdas of difference, and in a sale or an appraisal that's real money. When both units show up in the same conversation, convert; don't approximate in your head.
When you'll need the conversion
Comparing properties: listings aren't consistent. One neighborhood can have ads in cuerdas, in square metres and the occasional small lot in square feet. Putting all three in the same unit is the first step toward knowing which is bigger and which costs more per unit.
In documents: the registry, deeds and surveys generally use square metres, while neighborhood conversation runs in cuerdas. Translating between them is routine.
In quotes and materials: whoever quotes you a fence, earthwork, planting or a solar array works in metres or feet, not cuerdas.
The cuerda converter gives you all five units at once — cuerdas, square metres, acres, hectares and square feet — so you never have to chain conversions by hand.
A word about usable land
Three cuerdas of land doesn't mean three cuerdas you can build or plant on. Slopes, easements, setbacks, water and zoning eat usable area, and no unit conversion will warn you about any of it.
Use the conversion to compare and to get quotes. To decide what fits, you need the survey and someone who can read it.