Jeans are worn lower so the waist location for the jeans is probably different to where you are measuring your waist using the tape.
Secondly a jeans that says waist 34 is a finished waist 36 (its called vanity sizing).
So your waist where you wear the jeans is 36 from the body therefore do not use your pants measurements for ordering kilt!
I wear a 34 in Levis but my kilts range from 36-39 inches, depending on where I wear it.
If you send us your jeans waist size your kilt won't fit and you'll be a sad panda. :-(