Conversion preserves an area quantity; it does not verify the original measurement, boundaries or the area usable for your project.
One area, several units
Edit your assumptions. Results update immediately.
Mathematical area conversion. It does not verify boundaries, registered area, usable area or development rights. Confirm the local meaning of a cuadra or fanegada before converting it. Saved data stays in this browser; this tool does not send it to the server.
Identify the source of the square metre area
The input to this tool is an area in square metres. Before converting it, record the source: an advertisement, deed, certificate, cadastral record or survey. Retain the date, property identifier and meaning of the measurement. Land area, built floor area and the area of a portion offered for sale are not interchangeable even though all can be expressed in m². If a listing gives a number without a unit, ask for clarification; entering it as square metres would produce precise outputs for an assumption still unconfirmed. The converter performs mathematics and does not query the cadastre or register. IGAC documents procedures dealing with boundaries and areas with registration effects, helping distinguish a documentary discrepancy from a conversion task. To explore an offer, you can convert its advertised area while keeping that label. For negotiation or design dependent on size, property identity, document correspondence and measurement need checks by the competent people and appropriately scoped professionals.
Know the three factors being used
The calculator divides square metres by 10,000 to obtain hectares, by 4,046.8564224 to obtain international acres and by 0.09290304 to obtain square feet. One hectare is exactly 10,000 m² under the relationship published by BIPM. The other conversions use the international foot of 0.3048 metres: squaring that length produces 0.09290304 m² per square foot. One international acre contains 43,560 of those square feet, making it exactly 4,046.8564224 m². NIST distinguishes these factors from those based on the former U.S. survey foot; that other acre is not used here. An exact factor does not make the measurement you enter exact. If the listing states approximately 2,500 m², the equivalents retain that uncertainty. Do not round the factor yourself or replace an international acre with a similarly named local unit. Keep the definition beside the number when sharing the conversion so a reader can reproduce the result and recognise which convention was used.
Verify an example using 2,500 m²
Enter 2,500 m² as a hypothetical quantity. Dividing by 10,000 gives 0.25 hectares. Dividing by 4,046.8564224 gives approximately 0.61776345 international acres and dividing by 0.09290304 gives approximately 26,909.77604 square feet. The screen presents up to two decimal places, so the displayed figures are approximately 0.62 acres and 26,909.78 square feet, alongside 0.25 hectares. These numbers describe one area, not three different estimates of property size. As a reverse check, multiplying 0.25 hectares by 10,000 returns 2,500 m². Multiplying the rounded acre figure on screen by its factor will not recover the original value exactly; that comes from display rounding. Use the original input for subsequent calculations and retain extra digits in a separate worksheet when needed. This example does not represent a listed plot or establish that land of this size permits a house, subdivision or particular activity. Those questions belong to the documentary and planning review of the actual property.
Separate mathematical precision from measurement certainty
Displaying additional decimal places does not improve a survey or correct an approximate area. A result can be arithmetically correct while depending on an unsupported commercial figure. Presentation to two decimals can also hide small areas: a very small fraction of a hectare may display as zero in that unit even though the square metre input is positive. Refer to the original input and a suitably scaled unit; do not infer that the land disappears or that the calculation has verified a zero area. When transferring numbers between documents with different formatting, establish which mark separates thousands and which indicates decimals. The number 2.500 in Colombian text and 2,500 in English text can represent the same quantity, but not every document follows those conventions. The numeric field needs an unambiguous value. In a report, write quantity and unit together and retain the source. If two areas differ, first compare the object identified and its units before attributing the difference to rounding.
Confirm local units before converting
The tool assigns no size to fanegada, cuadra or other local names. Do not assume an equivalence because it appears in another listing, a search result or a conversation about a different municipality. Request the quantity in square metres and its supporting document. If an older document uses a historical unit, a professional should help interpret it within the property description and history. Record the explicitly confirmed local equivalence and who supports it; subsequent conversion is a separate operation starting from square metres. Do not silently replace the original figure, as that would prevent another person reviewing the interpretation chain. NIST provides factors for defined units and BIPM sets out unit relationships; those references do not determine what a seller meant by a local expression. If clarification changes the advertised area, revisit any price per square metre or budget based on it. An ambiguous unit is an outstanding question about the offer, not a nuisance to resolve by inventing a conversion factor.
Distinguish advertised, registered and surveyed area
Creating equivalents in several units does not resolve a discrepancy between a deed, cadastre, survey and listing. Prepare an external table showing the area, date, identifier and object described in each source. Establish whether all refer to the same whole property, a parent holding or a proposed portion. Law 1579 requires property identification in the registration context, and IGAC publishes guidance on area and boundary procedures with registration effects. Ask the cadastral manager and relevant office or professional about the route for your case, rather than assuming every difference can be corrected through a deed or that one universal tolerance applies. The converter does not choose which document prevails, update a register entry or determine rights over a disputed strip. If a seller offers a percentage of rights, multiplying that percentage by total area also does not establish a separate physical plot of that size. Interpreting the right and its location needs legal and technical review in addition to arithmetic.
Do not confuse size with shape or usable area
Two shapes can have the same area while requiring very different decisions. In an ideal geometric example, a square measuring 50 by 50 metres and a rectangle measuring 25 by 100 metres each contain 2,500 m². Their perimeters would be 200 and 250 metres respectively. The converter would show identical hectares and acres, but it does not estimate fencing cost or establish that a housing layout fits both shapes. It also does not model slope, orientation, access location, protected corridors, setbacks or restrictions. A survey should explain the measurement and representation used; do not turn a distance taken along a hillside into area by multiplying numbers without a method. In Medellín the POT contains rules and mapping relevant to development and territorial conditions. That enquiry must locate the property correctly and cannot be replaced by an invented buildable percentage. Total land area and the area you can intervene on are different quantities. Estimating the latter requires project information and a review of applicable restrictions.
Use a traceable conversion in your comparison
Save or download the input and equivalents when you need to share them, adding the originating document separately. Saving retains a version in this browser; the download neither obtains a certificate nor attaches the survey. To compare offers, bring areas into square metres with their sources and use the same meaning of area. If calculating price per square metre, also retain currency, date, total price and exclusions; a correct conversion does not verify price or offer quality. Have material differences reviewed before basing an advance, design or agreement on them. The next action may be obtaining the survey, clarifying a local unit, identifying the actual portion offered or consulting the cadastral manager. Repeat the conversion when the source figure changes and keep the reason for that change. A useful result is a comprehensible, reproducible quantity accompanied by evidence showing which area and property it describes, rather than a larger collection of decimal places.
Conversion-factor, precision and source-record worksheet
Record the original area before rounding and retain its source document. Conversion expresses the same quantity in another unit; it does not verify boundaries, buildable area or the nature of the offered interest.
| Item or decision | Information and evidence for your copy | Next check |
|---|---|---|
| Original quantity and unambiguous unit | Number as shown, decimal separator, unit, document, date and the area it describes. | Clarify whether it is total, measured or built area; do not convert an undefined regional unit. |
| Square metres and hectares | Base in m² and calculation using 10,000 m² per hectare, retaining the amount without intermediate rounding. | Check the direction of calculation and reverse conversion before copying into the listing. |
| International acre and square foot | Selected international unit and NIST reference factor; avoid mixing it with another foot definition. | Retain the factor and unit with the result so someone else can reproduce the conversion. |
| Rounding for presentation | Full working result, displayed decimal places and precision actually supported by the original measurement. | Round for presentation rather than at every step; extra calculation decimals do not improve the original measurement. |
| Difference between documents | Areas in title, cadastre, survey and offer, with references and comparable conversions. | Submit the discrepancy for review; differing converted quantities do not decide which legal description prevails. |
Sources & bibliography
Read the full document, its date, amendments and scope. The editorial review date describes this page; it does not establish an authorisation or a specific answer about your plot or financing.
- 01NIST · Revised Unit Conversion Factors, international foot and acrewww.nist.gov · International units
- 02BIPM · The International System of Units, ninth edition updated in 2026www.bipm.org · International units; Table 8 of the brochure
- 03IGAC · Cartilla de procedimientos catastrales con efectos registrales, 2025www.igac.gov.co · Colombia; confirm the competent cadastral manager
- 04Función Pública · Ley 1579 de 2012, Estatuto de Registrowww1.funcionpublica.gov.co · Colombia
- 05Alcaldía de Medellín · Plan de Ordenamiento Territorial y cartografíawww.medellin.gov.co · Medellín