Boat Draft Calculator

Calculate a boat's draft (depth of the boat in water) based on displacement, length, and beam

Input Parameters

Calculation Results

Calculation Formula

Draft (D) = Displacement (ρ × V) / (L × B × T)

Where:
D = Draft (m)
ρ = Water density (approx. 1025 kg/m³ for seawater)
V = Volume of displacement (m³) = Displacement (kg) / ρ
L = Length (m)
B = Beam (m)
T = Draft (m) - This is what we're solving for

Results

Water Density: 1025 kg/m³
Displacement Volume: 0.00 m³
Calculated Draft: 0.00 m

Boat Draft Calculator Calculator Usage Guide

Learn how to use the Boat Draft Calculator and understand its working principles

How to Use This Calculator

  1. Enter the boat's displacement in kilograms (kg).
  2. Enter the boat's length in meters (m).
  3. Enter the boat's beam (width) in meters (m).
  4. Click the "Calculate" button to compute the draft.
  5. The calculator will display the estimated draft in meters (m).

Understanding Boat Draft

Boat draft is the vertical distance from the waterline to the lowest point of the hull. It's an important parameter that affects a boat's:

  • Ability to navigate in shallow waters
  • Load-carrying capacity
  • Stability

Important Notes

  • This calculator uses the approximation formula based on displacement, length, and beam. For more precise calculations, additional parameters like hull shape should be considered.
  • The water density used is 1025 kg/m³, which is standard for seawater. For freshwater calculations, you can adjust this value accordingly (freshwater density is approximately 1000 kg/m³).
  • The calculated draft is an estimate and may vary based on actual hull design and other factors.