Yeah, you can use the shade-tree mechanic method Ken linked to, or you can do it right with a Sherline Trailer Tongue Weight Scale - 2,000-lb Capacity. I got mine from eTrailer.com for about $130 delivered.
Sherline Trailer Tongue Weight Scale - 2,000-lb Capacity Sherline Tools 5780
Reese/Drawtite sells the same thing for a lot more money. In fact, the Drawtite and Sherline both have that "5780" in the part number.
Draw-Tite Part No. 5780
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Grumpy ole man with over 60 years towing experience. Now my heaviest trailer is a 7'x16' 5,000-pound flatbed utility trailer, my tow vehicle is a 2019 F-150 Lariat 3.5L EcoBoost SuperCab with Max Tow (1,904 pounds payload capacity).