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Calcimator

Boat Displacement Calculator

Estimate your boat's displacement, waterline area, and theoretical hull speed from hull dimensions and type.

Inputs

ft
ft
ft

Results

Displacement

36,960 lbs

Hull Speed

7.34 knots

Displacement16.5 long tons
Waterline Area210 sq ft
Displaced Volume577.5 cu ft
D/L Ratio611
Classification (1=ultra-light, 4=heavy)4

Displacement

36,960 lbs

Hull Speed

7.34 knots

How to Use This Calculator
  1. Start by filling in the input fields below. Results update instantly as you type, so you can experiment with different values to see how they affect the outcome.
  2. Waterline Length — Length at the waterline (LWL) in feet. Accepts values from 8 ft to 200 ft (default: 30 ft).
  3. Beam (Width) — Maximum beam (width) of the hull in feet. Accepts values from 3 ft to 40 ft (default: 10 ft).
  4. Draft — Depth of hull below the waterline in feet. Accepts values from 0.5 ft to 15 ft (default: 3.5 ft).
  5. Hull Type — Hull design type affects displacement estimates. Choose from: Displacement (cruiser/trawler), Semi-Displacement, Planing (speedboat). default: 1.
  6. Once all inputs are set, review your results in the Results panel. Here's what each output means:
  7. Displacement — shown as a numeric value. This is the primary result of this calculator.
  8. Hull Speed — shown as a numeric value. This is the primary result of this calculator.
  9. Displacement — shown as a numeric value.
  10. Waterline Area — shown as a numeric value.
  11. Displaced Volume — shown as a numeric value.
  12. D/L Ratio — shown as a numeric value.
  13. Classification (1=ultra-light, 4=heavy) — shown as a numeric value.
  14. Explore the related calculators below if you need deeper analysis or want to approach this topic from a different angle.
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