Loaded Trailer Weight Calculator
Start with dry weight, then add what you actually carry.
Dry weight is not loaded weight
Water, batteries, propane, food, tools and camping gear can add substantial weight.
Estimate your trailer's real loaded weight
Dry or unloaded vehicle weight is only a starting point. The trailer you actually tow may also carry fresh water, propane, batteries, food, tools, camping gear and dealer- or owner-installed equipment. This calculator adds those items to the dry weight so you can compare a more realistic estimate with trailer GVWR and use it in your towing calculations.
Worked example
A trailer with a 5,200 lb dry weight gains about 250 lb from 30 gallons of fresh water, plus 80 lb of propane and tanks, 120 lb of batteries or power equipment, and 700 lb of gear. That produces an estimated loaded trailer weight of roughly 6,350 lb before any other items are added.
What should I use for fresh-water weight?
Water weighs about 8.3 lb per U.S. gallon. If you normally travel with only part of the fresh tank filled, enter the amount you actually expect to carry rather than the tank's full capacity. See How Much Does Water Add to RV Weight? for tank examples and how water can affect cargo capacity and load distribution.
Why GVWR still matters
Trailer GVWR is the maximum rated loaded weight of the trailer. Your estimated loaded weight should be checked against that rating, and the resulting tongue or pin weight should also be checked against the truck's payload, axle and hitch limits. If you want the full step-by-step process behind the estimate, read How to Calculate Loaded Trailer Weight.
Loaded trailer weight FAQ
Is dry weight the same as towing weight?
No. Dry weight generally does not include everything you add for a trip, so actual loaded weight can be significantly higher.
How much does 30 gallons of water weigh?
Using about 8.3 lb per gallon, 30 gallons of fresh water weighs roughly 249 lb.
What is the best way to know actual trailer weight?
A certified scale measurement of the trailer in normal travel condition is more useful than an estimate because it reflects the way the trailer is actually loaded.
Worked example: dry weight is not the towing weight
Illustrative trailer, not a verified RV specification. Begin with 5,200 lb dry weight. Add 30 gallons of fresh water (about 250 lb using 8.34 lb/gal), 80 lb of propane/tanks, 120 lb of batteries and 400 lb of trip cargo. The resulting planning estimate is approximately 6,050 lb loaded.
Checked here: the sum of entered cargo and water weights. Not verified: actual scale weight, whether all factory/dealer options are included in dry weight, trailer GVWR, tongue/pin transfer, truck payload, hitch rating and tow rating. Compare the estimate against the trailer's own GVWR, then take it to Payload Calculator or the Fifth-Wheel Calculator, as appropriate. For the combined check use Rig Check.