[Qgis-user] Assistance with Calculating Polygon Area in Hectares (EPSG:25832)

[Bernhard Ströbl]

Hi everybody,

Christoffer's expression indicates he expects a string as result, because he concatenates 'ha' 
@Christoffer: I would strongly recommend to use a numeric attribute. For display purposes you can still concatenate 'ha' later on.

Bernhard

> Phil Wyatt via QGIS-User <qgis-user at lists.osgeo.org> hat am 18.12.2025 08:39 CET geschrieben:
> 
>  
> Hi Christoffer,
> 
>  
> 
> Make sure the field is Decimal with a precision of 3. It may be that the
> field is using integer and the area of the polygon is less than 1 hectare in
> which case you need the precision of 3 to get square metres.
> 
>  
> 
> Cheers - Phil 
> 
>  
> 
> From: QGIS-User <qgis-user-bounces at lists.osgeo.org> On Behalf Of Christoffer
> Toft Hviid Jensen via QGIS-User
> Sent: Thursday, 18 December 2025 6:23 PM
> To: qgis-user at lists.osgeo.org
> Subject: Re: [Qgis-user] Assistance with Calculating Polygon Area in
> Hectares (EPSG:25832)
> 
>  
> 
> Hi Andrea
> 
> Oh sorry, i thought this was the support email. 
> 
> I hope you might be able to answer my question, and if not would be so kind
> to point me toward where i find the support email?
> 
> I am using the 3.44 version.
> 
> the CRS is EPSG:25832 - ETRS89 / UTM zone 32N
> 
> I use this expression round( $area / 10000, 2) || ' ha'  in the calculator
> box through the attributtable.
> 
> When i click enter, i just get a 0 in the ha field. Could it have something
> to do with the background i'm using coming from web-quickmapservice- google
> satellite?
> 
> Best regards
> 
>  
> 
> Christoffer Hviid
> 
>  
> 
>   _____  
> 
> Fra: Andrea Giudiceandrea <andreaerdna at libero.it
> <mailto:andreaerdna at libero.it> >
> Sendt: 17. december 2025 20:55
> Til: qgis-user at lists.osgeo.org <mailto:qgis-user at lists.osgeo.org>
> <qgis-user at lists.osgeo.org <mailto:qgis-user at lists.osgeo.org> >
> Cc: Christoffer Toft Hviid Jensen <cth at patriotisk.dk
> <mailto:cth at patriotisk.dk> >
> Emne: Re: [Qgis-user] Assistance with Calculating Polygon Area in Hectares
> (EPSG:25832) 
> 
>  
> 
> Hi Christoffer,
> this is the QGIS users' mailing list, not the "QGIS Support Team".
> 
> Not sure I understood correctly your issues and why you correlate the 
> downloading issue to the area calculation issue.
> 
> Anyway, regarding the area calculation issue, please specify the QGIS 
> version that you are using, the CRS of the layer which the features 
> geometries are stored in, and what expression you are using (and where 
> you are using it exactly) in order to obtain the measure of the area in 
> hectares.
> 
> Obtaining the value in hectares of the area of a feature's geometry in a 
> ESPG:25832 layer is as simple as using the expression: area(@geometry)/10000
> 
> See the documentation of the function 'area()' for more info: 
> https://docs.qgis.org/latest/en/docs/user_manual/expressions/functions_list.
> html#id25
> 
> Regards.
> 
> Andrea
> 
> > Christoffer Toft Hviid Jensen cth at patriotisk.dk
> > Wed Dec 17 06:35:44 PST 2025
> 
> > I am writing to request assistance with a workflow issue in QGIS.
> 
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