Physics

Immersed Weight Calculator

Find an object's apparent weight when submerged.

Object mass

Object volume

Fluid density (kg/m³)

Gravity (m/s²)

Calculated Output

Apparent weight (N) 29.43

Buoyant force (N) 19.62

Formula: W_app = m·g − ρ_fluid·g·V

Step-by-Step Breakdown

1. Values used:

2. Object mass = 5

3. Object volume = 0.002

4. Fluid density = 1,000 kg/m³

5. Gravity = 9.81 m/s²

7. Apparent weight = 29.43N

8. Buoyant force = 19.62N

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The math behind it

Apparent weight = actual weight − buoyant force = m·g − ρ_fluid·g·V.

5 kg, 0.002 m³ object in water → about 29.4 N (down from 49.1 N).

When does it float?

When buoyancy meets or exceeds the weight, giving zero or negative apparent weight.