How long does full propane tank typically last?

Are there any typical propane usage guidelines?  We camped this summer and fall with our T@B-CS (no extra S).  We haven't boondocked yet, so typically use electricity for the Alde.  Since our fridge is electric-only, that means cooking is almost the only use for propane. 
We did camp in 25 degrees in November and needed propane for our Alde.  Our inexpensive in-line propane gauge, at the tank, indicated we were somewhere less than 1/2 full.  Since previously we used so little propane, we were paranoid of running out of heat in the night....   After the trip, I pulled the tank out and sloshing it around, it felt over 1/2 full.  Measuring it on our bathroom scale was 30#.  Calculating a full tank: 15# + (80% 20#) = 31 lbs. 
So we do know the inexpensive in-line gauges are not very accurate.
How much mileage do others get on their propane?
I appreciate that Verna keeps an extra propane tank in her truck, but at the rate we seem to be using propane, an extra disposable cylinder might be all that we need to carry.
Thoughts?
T@B: 2018 320-CS Max
TV: 2017 Toyota Highlander

Comments

  • LSkrabutLSkrabut Posts: 30Member
    Take a look at the handle ring on top of your tank, the weight should be stamped on it. I would guess the empty tank is more around 17-18 lbs. I just topped mine up, it's weight empty was 18.6 stamped, after 6 days RV park camping and some propane heat checking out the ALDE, I used 1 gallon, now the tank weigh in at 38.8, 20.2 lbs for a full tank.

    Utah Driven

    2018 T@B 400

    MB GLK 250 Diesel

  • LSkrabutLSkrabut Posts: 30Member
    BTW, I like using a digital luggage scale (around  $10 online) to check how much propane is in the tank, 4 bs per gallon. ):

    Utah Driven

    2018 T@B 400

    MB GLK 250 Diesel

  • mammabear34mammabear34 Posts: 5Member
    LSkrabut said:
    BTW, I like using a digital luggage scale (around  $10 online) to check how much propane is in the tank, 4 bs per gallon. ):

    wow this is super smart !  I never would have thought of doing this !
    Paula & 2 yr old boy & a couple of 4-legged kids along for the ride.
    From Vancouver, WA (near Portland OR)
    2015 T@B S
    2016 Kia Sorento V6 AWD
  • ScottGScottG Posts: 1,551Moderator
    edited January 9
    U-Haul sells a tank with an integrated gauge operated by an internal float. It works great, and at $30 it's the best deal going. I picked up one based on a tip from this forum, and will replace my older tank with another when it expires.
    2015 T@B S
  • ChanWChanW Posts: 1,764Member
    $30? Excellent. I needed a new tank!
    Chan       --         Buffalo NY (Beau Fleuve)
    2014 'S' Maxx - 2011 Tacoma 4cyl Access Cab
     A_Little_T@b'll_Do_Ya

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