1. What is Water Density in SI Units?

Definition: This calculator estimates the density of water (ρ) in kilograms per cubic meter (kg/m³) based on temperature.

Purpose: It helps scientists, engineers, and students determine water density for various calculations at different temperatures.

2. How Does the Calculator Work?

The calculator uses the standard value:

And adjusts it based on temperature using a linear approximation:

• \( \rho \) — Density of water (kg/m³)
• Temperature — Input in degrees Celsius (°C)

Explanation: Water density decreases slightly with increasing temperature (for temperatures above 4°C).

3. Importance of Water Density Calculation

Details: Accurate water density values are crucial for fluid dynamics calculations, buoyancy problems, and various engineering applications.

4. Using the Calculator

Tips: Enter the water temperature in °C (between 0-30°C for accurate results). The calculator will show the estimated density.

5. Frequently Asked Questions (FAQ)

Q1: Why is water density important?
A: Water density affects buoyancy, fluid flow, heat transfer, and is fundamental in many scientific calculations.

Q2: What's the density of water at 4°C?
A: Water reaches its maximum density of about 999.97 kg/m³ at 4°C.

Q3: How accurate is this calculator?
A: It provides a good approximation near 25°C. For precise work, consult detailed water property tables.

Q4: Does salinity affect water density?
A: Yes, but this calculator assumes pure water. Saltwater is about 2-3% denser than freshwater.

Q5: Why does ice float on water?
A: Because ice is less dense than liquid water (about 917 kg/m³ vs 997 kg/m³ at 0°C).