About the Buoyancy Calculator
A free tool for finding buoyant force and predicting whether an object sinks or floats.
What it is
The Buoyancy Calculator applies Archimedes' principle to find the buoyant force on an object submerged in a fluid, compares it to the object's weight, and reports whether it sinks, floats, or is neutrally buoyant โ along with the submerged fraction or apparent weight as appropriate.
Features
Fluid presets
Fresh water, seawater, air, mercury, oil, or a custom density.
Sink/float verdict
A clear result showing whether the object floats, sinks, or hovers.
Submerged fraction
For floating objects, see exactly how much volume stays underwater.
Instant, private
Runs entirely in your browser. No data is sent anywhere.