How to find Delta v usage?

[M_Rat13]

If it's something obvious that I've missed, I apologize. However, what I'm looking for, is how do you know how much Delta v you have consumed? Stock, preferably. It's for measuring efficiency, you see.

[James Kerman]

Hello @M_Rat13.

I've moved your question to gameplay questions.

You can note down the VAB Dv info and use the in flight Dv measurement (at the bottom of the staging graphics left of screen) to see how much is left.

[MechBFP]

Keep in mind that DV changes based on atmospheric conditions, so you should look at the “vacuum” dV value and understand that a different launch profile will give you different results for the exact same ship. 

[Claw]

Stock doesn't have a "dV spent" tracker. The best bet, as suggested, is to know your starting dV and do the math based on what you have left.

 

If it's for efficiency, I assume you're attempting different ascent profiles for launch?