Calculate the density and volume of an object by comparing its weight in air versus its weight in a fluid.
Experimental Data
N
N
kg/m³
Object Properties
Enter weights to find physical properties
About this calculator
Quick Reference
W_airActual Weight (Scale in air)
W_fluidApparent Weight (Scale in fluid)
Buoyant ForceW_air - W_fluid
VolumeF_buoyant / (ρ_fluid * g)
Overview
This method, often called hydrostatic weighing, uses Archimedes' principle to find the volume and density of an irregularly shaped object without measuring its dimensions directly.
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Pro Tips
The weight difference (W_air - W_fluid) is equal to the buoyant force.
Ensure the object is fully submerged and not touching the sides or bottom of the container during the fluid measurement.
The sample must be denser than the fluid to fully submerge.
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Fun Facts
"This is exactly how Archimedes verified the purity of the King's crown!"
"Jewelers use this technique to distinguish between real and fake gemstones."
"The ratio of (Weight in Air) to (Weight in Air - Weight in Water) gives the Specific Gravity of the object."
