Tip: water at room temperature is close to \(1\,\text{g/cm}^3\) \((\approx 1000\,\text{kg/m}^3)\). If your result is near that, your inputs are likely reasonable.
Density tells you how much mass is packed into a given volume. Materials with higher density have more mass in the same amount of space.
$$ \rho \;=\; \frac{m}{V} $$
Here \( \rho \) is density, \( m \) is mass, and \( V \) is volume. In the SI system the standard units are kilograms for mass and cubic meters for volume, so density is expressed as \( \text{kg/m}^3 \).
$$ [\rho] = \frac{\text{kg}}{\text{m}^3} $$
A very common laboratory unit is \( \text{g/cm}^3 \). The two are related by
$$ 1 \ \text{g/cm}^3 \;=\; 1000 \ \text{kg/m}^3 $$
If you know any two of \( \rho \), \( m \), and \( V \), you can find the third:
$$ m = \rho V \qquad\text{and}\qquad V = \frac{m}{\rho}. $$
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