How to read the result
All inputs are pounds. Load = your weight + gear weight. Margin = stated capacity − load, also shown as a percentage of the stated capacity rounded to one decimal. The planner uses no hull geometry, no freeboard estimate and no performance band: it is arithmetic on the seller's own figure. A positive margin only means the load is below the number printed on the listing.
A stated maximum is a seller figure, not a stability or safe-load test. Manufacturers such as Old Town publish a separate usable capacity for people and gear that is lower than the maximum; when a manual gives that figure, plan against it. Water conditions, seating position and how the load is distributed are outside this tool.
Before choosing a fishing kayak
- Read the stated capacity, length, width and hull weight on the exact listing and in the manufacturer manual.
- Add your own weight to every piece of gear, including a battery or motor if the listing does not include them.
- Check whether the paddle, seat, pedal drive or motor is included or sold separately.
- Check the personal flotation device, registration and lighting rules of the U.S. Coast Guard and your state boating authority.
This tool answers an arithmetic question and nothing else. It does not establish that a kayak is stable, safe or suitable for any water; take those questions to the manufacturer manual and the authorities above.
Read our research methodology and the weight capacity guide.