Flotting Calculator

Buoyancy & Flotation Calculator

Object Mass (kg):

Object Volume (m³):

Fluid Density (kg/m³): Fresh Water (1000 kg/m³) Salt Water (1025 kg/m³) Gasoline (800 kg/m³) Custom Density

Results:

Buoyant Force: 0 N

Object Weight: 0 N

Net Force: 0 N

Flotation Status: -

⚓ How Flotation Calculation Works

This calculator uses fundamental fluid mechanics principles:

• Archimedes' Principle: The buoyant force equals the weight of displaced fluid
• Newtonian Physics: Force comparisons between object weight and buoyant force
• Density Relationships: ρ_object vs ρ_fluid comparison

Core Equations:

Buoyant Force (F_b) = ρ_fluid × V × g

Object Weight (F_g) = m × g

Net Force = F_b − F_g

🌊 Frequently Asked Questions

Q: How accurate is this calculator for real-world applications?

A: Provides theoretical values assuming:

• Complete submersion
• Uniform density
• Static fluid conditions
• Add 10-15% safety margin for practical use

Q: Can I use imperial units (lbs, cubic feet)?

A: Convert first using:

• 1 lb = 0.4536 kg
• 1 ft³ = 0.0283 m³
• Fresh water density: 62.4 lb/ft³

Q: Why does my object sink when calculator says it should float?

Common reasons include:

• Air pockets in object
• Surface tension effects
• Fluid temperature variations
• Non-uniform density distribution

Q: How does shape affect flotation?

While the calculator assumes full submersion:

• Flat shapes displace more water when floating
• Streamlined shapes reduce drag
• Stability depends on center of buoyancy vs center of mass

Q: What about partially submerged objects?

For floating objects:

• Only submerged volume counts
• Use iterative calculation
• V_submerged = m/(ρ_fluid)