Boat EconomicsTrailering and Practical Fit
What Tongue Weight Should This Loaded Trailer Target?
Calculate a target tongue-weight range from your loaded trailer weight and a chosen percentage, then check a measured value against it and your hitch rating.
Have your setup physically measured with a tongue-weight scale. This tool only checks the number you enter against a chosen target band and any hitch rating you provide; it does not declare your setup stable or safe, and it does not tell you how to move weight to fix it.
A target percentage is a starting point, not a verdict on your specific setup
Tongue weight guides commonly cite a 10 to 15 percent target range of loaded trailer weight, but that is a general starting point, not a rule specific to your trailer, hitch, and vehicle combination. This engine turns that percentage into a pounds target and checks a measured value against it, without pretending to know your equipment's actual engineering limits.
How this is calculated
The target low and high bounds multiply your loaded trailer weight by your chosen low and high percentages. If you enter a measured tongue weight, an optional cargo-shift scenario adjusts it, and the result is checked against the target band and, separately, against any hitch tongue-weight rating you provide.
Worked example
A 5,000 pound loaded trailer at a 10 to 15 percent target range gives a target of 500 to 750 pounds. A measured tongue weight of 600 pounds falls within that band. The same measurement checked against an 800-pound hitch rating would not exceed it; checked against a lower-rated hitch, the tool would flag that separately from the target-band result.
Common mistakes
Treating a generic percentage target as if it were the trailer manufacturer's own specification is the most common mistake here; always check your specific trailer's documentation first. The other is skipping a physical measurement entirely and assuming the loaded weight math alone is enough.
Frequently asked questions
Where does the 10-15% default come from?
It is a commonly cited starting range in towing guides, not a universal rule for every trailer and hitch combination. Your trailer, hitch, and vehicle manufacturer's own documentation always outranks this generic default; adjust the target percentage fields if your equipment specifies something different.
Does this tell me my trailer is safe to tow?
No. This only checks a number you enter against a percentage-based target band and, if provided, a hitch rating. It does not declare your setup stable, safe, or towable, and it does not replace a physical measurement.
How do I actually measure tongue weight?
A dedicated tongue-weight scale is the most accurate method; bathroom-scale-and-lever setups exist but are less precise. This tool does not walk through the measurement process itself, only what to do with the number once you have it.
What if my measurement is outside the target band?
This tool flags that and shows by how much, but it does not instruct how to move weight to fix it, that is a physical task for you or a trailer shop, informed by your specific trailer's load points and manufacturer guidance.