Frequently Asked Questions
What is immersed weight?
The apparent weight of an object when fully submerged: true weight minus the buoyant force from the displaced fluid.
Why does it depend on volume?
Because the buoyant force equals the weight of fluid displaced, which scales with volume (not mass). Equal-mass objects of different volumes feel different apparent weights.
Can apparent weight be negative?
Yes - if the object's density is less than the fluid's, the buoyant force exceeds gravity and the object floats. Apparent weight is negative in that sense (upward net force).
How do I convert immersed weight back to a scale reading in kg?
Divide the apparent weight in newtons by g = 9.81 m/s² to get the equivalent mass a hanging scale would show in kilograms. In the worked example, 78.5 N ÷ 9.81 ≈ 8.0 kg, so a 10 kg block reads about 8 kg while fully submerged. The object feels lighter underwater even though its real mass never changes.
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This calculator provides estimates for informational purposes only. Results are based on assumptions and may not reflect actual outcomes. Consult qualified professionals in relevant fields before making important decisions based on these results.