RV MAX LOADS & Weights Calculator

I don't think there is a simple one size fits all calculator. There are too many issues involved. First what weight are you starting with? If you start with the actual dry weight for your specific RV, you have a chance. Quite often potential buyers are looking at manufacturer's "specs". They often do not include accessories and you need to read and study the fine print if it is available. You need to add in the weight for all of the manufacturer's accessories and any accessories you might add such as upgraded mattress, extra batteries, solar, generator, etc, etc. Next you need to add the weight for personal items which I would define to include bedding, towels, clothing, cooking gear, hobby stuff, laptops, tools, cleaning supplies and heaviest of all, food and drinks. New RVers typically underestimate these weights by a long, long way. It is easy to get to a 1000# not counting extras such as bikes and carrying racks, yard furniture, BBQ.

If you want a formula I can only list the major concerns: manufacturer accessories, upgrades and accessories you add including vehicle mods, 8# for every gallon of liquids, roughly 1000# for personal items, weight of passengers if that pertains to you RV. For trailers you will also need to estimate tongue weight and make sure the tow vehicle is sufficient in that regard.

There is one other safety/weight related item I really need to mention and that is tire load capacity. Be sure you have quality tires. Many manufacturers seem to be installing cheap, China bombs instead of quality tires. Next be sure your tires are properly inflated at all times. Finally realize that tires will dry rot when not in use. In fact they dry rot quicker when not used regularly. Plan on replacing tires every 5 years regardless of wear.