What's my efficiency???

[telebrewer]

I wanted to hit 1.075.
13# 2 row
.5#crystal 10L
.5#crystal 40L
.5# carapils

4.5 gal H20
Mash @ 152 to 154+
got 2 1/2 gal. first runnings. SG 1.081
Sparged to get 7.25 wort volume, that was 1.050 SG
Boiled down to just under 5 gal. at 1.070 OG
My burners boil too much off, I need to choke down.
Does anyone know what my efficiency might be?
I have a Mac and can't get beersmith or promash. I heard I can get beertools but hav'nt tried it.
Thanks...

 

[bob1852]

my numbers put you at around 64-67%....

IPA I'm assuming? what was your hop schedule?

 

[telebrewer]

Yea, IPA
Hops...
! oz. Magnum @ 50 min.
.5 oz. Centennial @ 40 min.
1 oz. Centennial @ 20 min.
1 oz. Chinook @ 1 min.

I'll dry hop with 2 oz. of something.

I want to get better efficiency...