What determines if an object floats?

An object floats if its average density is less than the fluid density. A steel ship floats because it is hollow — average density (steel + air) is less than water density.

What is metacentric height?

Metacentric height GM = BM - BG, where B is center of buoyancy and G is center of gravity. GM > 0 means stable; GM 0.15-0.30m minimum.

How does salt water affect buoyancy?

Salt water (ρ ≈ 1025 kg/m³) is denser than fresh water (1000 kg/m³), providing 2.5% more buoyancy. Ships float higher in salt water and carry more cargo safely.

Buoyancy Calculator

Calculate buoyant force F_b = ρ_fluid·g·V_displaced. Determine whether objects float (ρ_object < ρ_fluid) or sink. Stability of floating bodies using metacentric height GM calculation.

2D stress state at a point. All stresses in MPa.

σx — Normal Stress X (MPa)

σy — Normal Stress Y (MPa)

τxy — Shear Stress (MPa)

⚙ Mechanical Note: Results are based on standard textbook formulas and ISO/AASHTO references. Always verify critical designs with applicable codes (ISO 898, AASHTO 1993, AISC, Eurocode 3) and a qualified engineer.

How to Use

Enter the values for the patient or scenario you are assessing. Calculate buoyant force F_b = ρ_fluid·g·V_displaced. Determine whether objects float (ρ_object < ρ_fluid) or sink. Stability of floating bodies using metacentric height GM calculation. Use the buoyancy result to inform your clinical assessment.

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Frequently Asked Questions

What determines if an object floats?

What is metacentric height?

How does salt water affect buoyancy?