My efficiency

Need help with calculating my efficientcy. Went from BIAB to a MLT for the first time with Cream of Three Crop. Not sure if I use my pre boil or post boil numbers. Also I understand there are different types of efficiecy calculations, not sure which one I want, just want to compair to what other people get when they say my efficiecie was ...

Pre boil I had 13 gal of wort at 1.043
Post boil I had 11 gal of wort at 1.047

12 lb Pale Malt (2 row) US
4 lb Flaked Corn, Maize
1 lb minuite rise
one hand full of rice hulls.

I mashed in with 7 gallons of water, had to add another gallon to get my temp up to 152. Got down to about 151.5 at about 80 minuits so I stopped the mash. Got roughly 5.5 gallons of wort from the first run. Added 7 gallons of 190 deg water to batch sparge, got that seven plus a little more back.

So what do you guys come up with for my efficiency if you dont mind running the numbers?
My gravity readings came from a refractormeter.

Here's the one I use, and they explain different efficiencies as well. http://www.brewersfriend.com/brewhouse-efficiency/

86% seems kind of high for my first time. There wasnt an option for regular rice so I used flaked rice in the calculator.

12lbs x 37ppg = 444
4lbs x 39 = 156
1lb x 39 = 39
639 points total.

You have 47 points times 11 gallons for 517 points. 517 out of 639 is about 81%.

Ok so I need to use the in the fermenter number, or post boil numbers. Thanks.

Those numbers should not be different. You could have boiled over or lost some in hops and break material. I go with the fermenter volume. It's just easier to get more accurate volume numbers that way for me.

Once you have your boil volume and a gravity reading you can calculable your post boil gravity. It's just the gravity times the volume divided by the post boil volume.