Boat & Marine Calculators
5 free calculators — all 50 states
Calculate the true cost of boat ownership including loans, insurance, marina fees, maintenance, fuel, and winterization.
All Calculators
Boat Depreciation Calculator
Calculate how much your boat will depreciate over time. See current and future resale value, annual depreciation rate, and cost per year of ownership.
Boat Fuel Cost Calculator
Modeled 150 HP gas example at 45% load: 6.75 GPH, ~$30/hour or $121 for 4 hours at EIA's $4.48 road price—not a marina quote.
Boat Insurance Cost Calculator
Progressive's published averages run about $301/yr in its lowest-cost states to $657/yr in its highest. Your premium depends on boat type, age, value, experience and cruising waters — adjust the calculator to match a real quote.
Boat Loan Calculator
Calculate boat loan payments, total interest, and financing costs. See how down payment, term, and rate affect your marine loan.
Boat Ownership Cost Calculator
Calculate the real cost of owning a boat. See loan payments, insurance, marina fees, maintenance, fuel, and winterization costs broken down.
About Boat & Marine Calculators
Calculate the true cost of boat ownership including loans, insurance, marina fees, maintenance, fuel, and winterization. All 5 calculators are free to use, require no sign-up, and provide instant, formula-based results — see each calculator's own methodology section below for exactly how its figures are calculated and sourced.
Each calculator includes a detailed methodology section explaining the formulas used, data sources cited with verification dates, and frequently asked questions to help you understand the results. Results are shareable and print-friendly.