Physics

Water Density Calculator

Find the density of pure water at a given temperature.

Calculated Output

Density (kg/m³) 998.2

Formula: Kell's equation (0–150 °C)

Step-by-Step Breakdown

1. Values used:

2. Temperature = 20 °C

4. Density = 998.2kg/m³

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The math behind it

This uses Kell's empirical equation. Water is densest (~1000 kg/m³) at about 4 °C and lighter when warmer or frozen.

At 20 °C → about 998.2 kg/m³.

Why does ice float?

Ice is less dense than liquid water — an unusual property crucial for aquatic life.