Difference in DV between kerbal Engineer and KSP Optimal Rocket Calculator

[obijanshinobi]

Hi all,

I use the mod Kerbal Engineer Redux (latest version). When I look for an optimal rocket for a specific delta v on the KSP optimal Rocket Calculator website (http://garycourt.github.io/korc/)

and then afterwards build this rocket in KSP, the Kerbal Engineer mod shows me completely different values for delta V.

Is there a difference in how delta V is calculated in the two tools? Or do I misinterprete the delta V in one of the tools?

Any info is welcome,

Obijan

[Alshain]

Engineer has an Atmosphere button. If it isn't selected, it is showing you delta V in a vacuum. I have no idea which one your website is telling you.