How to calculate liquid volume

Written by robert kohnke
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How to calculate liquid volume
Calculating liquid volume requires knowledge of the mass and density. (water image by Maria Brzostowska from

Knowing the amount of volume that you have in a container can be a very important piece of information. Whether it is medication or experimentation, improper amounts of a liquid can have dangerous results. Here is a simple formula to determine the exact volume of the liquid in your container.

Skill level:


  1. 1

    Find the mass of the liquid. Mass can be a known unit, or it can be determined with a scale or other mass measuring device.

  2. 2

    Find the density of the liquid. If this is not a known number, the density of most common liquids can be found in chemistry books or online.

  3. 3

    Note that the formula for finding liquid volume can be determined through simple mathematics. Use the formula liquid volume equals mass divided by density (Volume=mass/density).

    For example: Density = 2.0g/ml Mass = 8g Volume = 8g / (2.0g/mL) = 4mL

Tips and warnings

  • Make sure the units of your density match those of the volume and mass. If density is g/ml, the volume will be in ml and the mass must be in grams.

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