This water density calculator allows you to compute water density in two different situations, based just on temperature or also on salinity values. You can read more on this subject below the form.

## How does this water density calculator work?

This is a tool that helps you determine water density in kg/m^{3 }in two different situations. The first is based only on temperature values and in this case you only need to input temperature in Celsius, Fahrenheit, Kelvin or Rankine. The second calculation made by the water density calculator discovers density taking into account both temperature and water salinity in mg/L. This is especially useful when wanting to make determinations on samples of ocean water or similar. The formula used in the first calculation is the following:

**Water Density = 1000 * {1 - [(T + 288.9414) /508929 * (T + 68.129630)] * (T – 3.9863)^2}**

## Example calculation

Let’s take for example a sample of water at a temperature of 15 degrees Celsius with a salinity of 3000 mg/L.

If it were to compute the water sample density taking account just the temperature the result would be 999.10 kg/m^{3} while if it were to consider the salinity as well the result would be 1001.44 kg/m^{3}.

## Water facts

- Density of pure water is a constant at a certain temperature not depending on sample.
- The density of water varies according to temperature and the degree of purity.
- At 4 degrees Celsius pure water has a density of 1g/mL or 1kg/L and a specific gravity of 1.
- Freezing water expands over 9% by volume and ice floats on water because it is lighter.