Buoyancy Calculator

Calculate buoyant force on an object submerged in fluid using Archimedes' Principle. Determine whether an object will float or sink.

Enter Your Measurements

Object Volume (m³)

Fluid Density (kg/m³)

Object Mass (kg)

Results

Buoyant Force

98.10

Weight Force

78.48

Net Force (+ floats, - sinks)

19.62

Object Density

800.0

kg/m³

Formula

F_b = ρ_fluid × g × V_displaced | Floats if F_b ≥ Weight

How to Use This Calculator

How to Use

1
Enter the volume of the submerged object in cubic meters.
2
Enter the density of the fluid (water = 1000 kg/m³).
3
Enter the mass of the object.
4
Get buoyant force and whether it floats.

Frequently Asked Questions

Why do ships made of steel float?

Ships float because their total volume (including hollow hull) displaces enough water to equal their weight. The average density of the ship + air inside is less than water.

What is the density of seawater?

Seawater is approximately 1025 kg/m³ — slightly denser than freshwater (1000 kg/m³), which is why it's easier to float in the ocean.

Related Calculators

Water Pressure at Depth Calculator

Gravitational Force Calculator

About This Calculator

This calculator uses the formula: F_b = ρ_fluid × g × V_displaced | Floats if F_b ≥ Weight. All calculations follow industry-standard methods. Results are estimates — always verify with a licensed professional for structural or code-compliant work.

Built and maintained by the CalcSmart team. Last updated March 2026.

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