⚓ Boat Sizing & Capacity Calculators

Hull speed, displacement, max horsepower, trailer tongue weight, trailer capacity, boat capacity, and prop size calculators.

Calculate the theoretical hull speed of a displacement boat based on waterline length. Understand the speed limit imposed by hull design.

Calculate boat displacement from hull dimensions or convert between displacement weight and volume. Understand your boat buoyancy.

Calculate the USCG maximum horsepower rating for your boat based on length, beam, and transom height. Stay within safe power limits.

Calculate the estimated tongue weight of your boat trailer combination. Ensure your tow vehicle hitch can safely handle the load.

Determine the minimum trailer capacity needed for your boat. Factor in boat weight, engine, fuel, and gear for proper trailer sizing.

Calculate USCG-style maximum persons and weight capacity for a boat. Know how many people and how much gear your boat can safely carry.

Calculate the optimal propeller diameter and pitch for your boat and engine combination. Match your prop to your boating style.