This calculator converts percentage by volume or parts by volume to percentage by weight and also parts by weight. The Density or Specific Gravity of each indivdual component is required. This calculator is useful when mixing components by weight is preferred to mixing by volume. Density can be in any units provided the units are the same for all components. Specific Gravity is unitless so it can be used anytime. Please do not use a mix of density and Specific Gravity. Please use the "Add Rows" button if there are more than two components.