How full is my oil pan?

I know on a trans pan, the static level is about 1/4 inch above the pan rail where it will seep out the dipstick if allowed. Oil pans should be easy to figure out, just put the dipstick in and youll get a rough estimate where the static fluid line is. Used to be a good indicator of whether your trans dipstick O-ring was bad was if it leaked over night but not while idling.