Density of Water in kg/m³

Density Formula:

\[ \rho = \frac{m}{V} \]

Density (ρ):

kg/m³

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1. What is Water Density?

Definition: Density is mass per unit volume, typically measured in kg/m³ for water.

Standard Value: Pure water has a density of ~1000 kg/m³ at 4°C (39°F).

2. How Does the Calculator Work?

The calculator uses the formula:

\[ \rho = \frac{m}{V} \]

Where:

\( \rho \) — Density (kg/m³)
\( m \) — Mass (kilograms)
\( V \) — Volume (cubic meters)

Explanation: The mass of water is divided by its volume to calculate density.

3. Importance of Water Density

Details: Water density affects buoyancy, fluid dynamics, and is fundamental in hydrology, engineering, and environmental science.

4. Using the Calculator

Tips: Enter the mass of water in kilograms and volume in cubic meters. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why does water density change with temperature?
A: Water molecules move farther apart as temperature increases, decreasing density (maximum density at 4°C).

Q2: How does salinity affect water density?
A: Saltwater is denser than freshwater - seawater averages about 1025 kg/m³.

Q3: What's the density of ice compared to water?
A: Ice is less dense (~917 kg/m³) which is why it floats on water.

Q4: How precise is the 1000 kg/m³ standard?
A: It's exact by definition at 4°C, but varies by 0.2% near room temperature.

Q5: When would I need to calculate water density?
A: For scientific experiments, engineering projects, aquarium maintenance, or when working with non-standard water conditions.