Marine Calculators
Professional-grade calculators for boat builders, designers, and marine engineers. Get precise measurements and calculations for your marine projects.
Essential calculations for boat design and construction
Hull Volume
Calculate boat hull volume and displacement
Inflatable Volume
Calculate inflatable boat tube volume
Transom Thickness
Calculate required transom thickness
Structural Load
Analyze structural loads and stress
Deck Plank Spacing
Calculate optimal deck plank spacing
Fiberglass Ratio
Calculate resin-to-cloth ratios
Keel Width
Calculate optimal keel dimensions
Fabric Strength
Calculate required fabric strength
Seam Reinforcement
Calculate seam strength requirements
Tube Inflation
Calculate proper inflation pressure
Boat Loan
Calculate boat financing payments and costs
Boat Weight
Estimate hull and loaded weight
Boat Capacity
Calculate max persons and load (AU)
Fiberglass Weight
Calculate laminate weight and resin
Optimize your sailing performance with precise calculations
Center of Effort
Calculate sail plan center of effort
Mast Height Ratio
Calculate optimal mast height
Righting Moment
Calculate boat stability forces
Sheet Load
Calculate sail sheet loads
Heel Angle
Calculate expected heel angles
Sail Area
Calculate optimal sail areas
Keel Gravity
Calculate keel center of gravity
Wind Efficiency
Analyze sailing efficiency
Apparent Wind
Calculate apparent wind conditions
True Wind
Calculate true wind from apparent
Calculate and analyze essential boat measurements
Length-Beam Ratio
Calculate length to beam ratio
Displacement Length
Calculate displacement-length ratio
Waterline Length
Calculate effective waterline length
Draft Depth
Calculate optimal draft depth
Freeboard Height
Calculate appropriate freeboard
Sail-Displacement
Calculate sail area to displacement
Hull Speed
Calculate theoretical hull speed
Prop Pitch
Calculate optimal propeller pitch
Power-Weight
Calculate power to weight ratio
Engine Consumption
Calculate fuel consumption rates
Engine Size
Calculate recommended engine HP
Gear Ratio
Calculate optimal marine gear ratio
Block Coefficient
Calculate hull fullness (Cb)
Calculate power requirements and fuel consumption
Fuel Economy
Calculate fuel consumption rates
Range Calculator
Calculate maximum range
Horsepower-Speed
Calculate speed from horsepower
Battery Sizing
Calculate battery requirements
Solar Requirements
Calculate solar panel needs
Alternator Output
Calculate charging capacity
Voltage Drop
Calculate wiring requirements
RPM-Speed
Convert engine RPM to speed
Prop Slip
Calculate propeller efficiency
Fuel Volume
Calculate tank capacity
Fuel Trip Cost
Calculate trip fuel cost in AUD
Calculate and analyze electric motor performance and requirements
Power-to-Thrust
Calculate thrust output from motor power input
Motor Efficiency
Calculate motor efficiency and power loss
RPM to Speed
Convert motor RPM to boat speed
Torque Output
Calculate motor torque output
Voltage to Speed
Convert voltage to motor speed
Wattage Requirement
Calculate required motor power
Propeller Efficiency
Calculate propeller to motor matching
Current Draw
Calculate motor current requirements
Heat Dissipation
Calculate motor cooling needs
Controller Efficiency
Calculate motor controller performance
Electric Boat Range
Calculate range and runtime
Trolling Motor Thrust
Find the thrust your boat needs
Why Choose Our Calculators?
Precision
Accurate calculations based on marine engineering principles
Comprehensive
All the tools you need in one place
Professional
Designed for marine professionals and enthusiasts