ArcGis Pro cell size

[ColinGorman]

Hi.

I am using the Point to Raster tool at the moment and am trying to figure out what I should be entering in the Cell Size input box to achieve a cell size of 0.25Km2 (500m x 500m). Appreciate it if someone could give me advice as to what I should be entering? The map is in WGS84.

[DanPatterson]

If you want a cell size of 500 then you should specify a coordinate system that is not in decimal degrees, perhaps use a UTM coordinate system for your area or some other Projected coordinate system used by your locale.

You can't specify a cell size in decimal degrees that will translate to what you want.  Also don't use Web Mercator, even though it is a PCS