Calculate buoyancy from displaced fluid volume and determine whether an object floats.
Buoyant force equals the weight of the fluid displaced, so whether something floats depends entirely on comparing its average density with the fluid’s. A steel ship floats because its average density including enclosed air is low. Density comparison is the whole test: hollow shapes float because they displace far more fluid than their material volume alone.
Buoyant Force
F_b = ρ_fluid g V_displaced
F_b = ρ_fluid g V_displaced Buoyant force equals the weight of the fluid displaced, so whether something floats depends entirely on comparing its average density with the fluid’s. A steel ship floats because its average density including enclosed air is low.
Density comparison is the whole test: hollow shapes float because they displace far more fluid than their material volume alone.
This calculator takes 4 inputs: Object volume, Object mass, Fluid density, Share of the object submerged. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.