Fluid Density from Specific Weight
What is Fluid Density from Specific Weight?
Fluid density is a measure of the mass per unit volume of a fluid. It can be calculated using the specific weight of the fluid and the gravitational acceleration constant. Specific weight is the weight of a unit volume of a substance and is related to fluid density by the formula:- Fluid Density (ρ) = Specific Weight (γ) / Gravitational Acceleration (g)
How to Calculate Fluid Density from Specific Weight
To calculate the fluid density, use the formula:- ρ = γ / g
- Where:
- γ = Specific weight of the fluid (N/m³)
- g = Gravitational acceleration (9.81 m/s²)
Example Calculation
For example, if the specific weight of a fluid is 9800 N/m³, the fluid density is:- ρ = 9800 / 9.81 = 999.59 kg/m³
| Fluid | Specific Weight (N/m³) | Fluid Density (kg/m³) |
|---|---|---|
| Water | 9800 | 1000 |
| Seawater | 10250 | 1040 |
| Mercury | 130000 | 13265 |
| Oil | 8500 | 866.73 |