Originally Posted by Chowboy
2 scales<$100 including 4' of 2X10 Put tongue on 2X10, read scales, adjust accordingly
That will work for small trailers with less than 600 pounds of tongue weight. But it won't work for even my 19' TT, which could have tongue weight over 800 pounds, unless you find bathroom scales with more than 300 pounds capacity. Even my expensive balance-beam scale goes up to only 350 pounds, and two of those wouldn't be enough if my small TT were loaded for bear with over 800 pounds tongue weight.
A tongue weight scale calibrated for tongue weights up to 2,000 pounds is the simple answer. Those will work for any TT with GVWR less than about 13,000 pounds, and they don't make many TTs that heavy. Works good. Jack up the tongue with the tongue jack, then lower the tongue onto the tongue weight scale. No math involved; just read the scale.
My Sherline Tongue Weight scale cost me about $125 online.
Sherline Trailer Tongue Weight Scale - 2,000-lb Capacity
But if $125 is too rich for your blood, then there some pretty good DIY articles on the net that explain how to do it with a cheap bathroom scale. Here's one: