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This buoyancy and flotation calculator helps you determine whether an object sinks or floats in a fluid. It compares the density of the object with the density of the fluid: if the object's density is greater, it sinks; if lower, it floats. The calculation is based on Archimedes' principle, which states that a body immersed in a fluid experiences an upward vertical force equal to the weight of the displaced fluid. The calculator can also estimate the fraction of the object's volume that is submerged when it floats.

To use the tool, simply enter the density of the object and the density of the fluid. The calculator then compares the values and displays the result: sinks, floats, or is in equilibrium (equal densities). Additionally, if the object floats, it shows the percentage of the volume that remains submerged. This calculation is useful for understanding phenomena such as steel ships floating in water, icebergs, or the buoyancy of materials in liquids.

Common use cases include naval engineering projects, verification of buoys, analysis of materials for boat construction, or simple scientific curiosity. For example, you can find out whether a Styrofoam block floats in water or whether a stone sinks. The calculator is also useful for physics students who want to practice Archimedes' principle and understand the equilibrium conditions of immersed bodies.

Important precautions: make sure to use consistent units for densities, such as kg/m³ or g/cm³. The calculator assumes the object is fully immersed or partially submerged under static conditions. Remember that the density of fluids like freshwater and seawater are different (approximately 1000 kg/m³ and 1025 kg/m³, respectively). Additionally, the presence of air or cavities in the object can alter its effective density.