[Qgis-user] Which settings for mesuring tool?

[Joris Hintjens]

Hello
I have 2 point  in Portugal
my project CRS is pseudo Mercator (EPSG 3857)
When I create a buffer of 30 km around my points layer cars is also EPSG 3857), I get Two nice circles (layer also CRS 3857). When i measure the circles, they are 45 km in diameter. What can be wrong?

What settings shouldI in general use for the measuring tool?

thanks for your comments
Joris