This calculator can be used for making a Solution with the desired concentration of Isopropyl Alcohol ((CH₃)₂CHOH), for adjusting the Isopropyl Alcohol concentration of a Solution, and for mixing Solutions with known concentration of Isopropyl Alcohol. Please enter the Mixing Temperature (initial value is given as 20°C) and any combination of four entries of Weight (or Volume) and Concentration values for Isopropyl Alcohol Solution. The blanks represent the values to be calculated. Volume or weight of Solution may be used. Just click on the "Weight" or "Volume" button to change to volume or weight units (Click here for illustration). Concentration may be expressed in percent by weight or percent by volume Isopropyl Alcohol. To use water for diluting an Isopropyl Alcohol solution just input its concentration as zero percent (as in no Isopropyl Alcohol content). The calculator uses a table (see Examples) of concentration (% Isopropyl Alcohol by weight or volume) and its equivalent density. Interpolation is used to compute density values that are between the values in the table. The density is then used to compute volume or weight as needed. The Isopropyl Alcohol in water density-concentration table was taken from "Perry's Chemical Engineers' Handbook" by Robert H. Perry, Don Green, Sixth Edition. This calculator includes the choice of expressing concentration in % Volume Isopropyl Alcohol. Click on the "Use Percent Volume Isopropyl Alcohol" button to switch to % Volume. Please be careful that the correct volume or weight units and the correct concentration expression (% Volume or % Weight) are used in your application. This calculator accounts for volume contraction that results when mixing Isopropyl alcohol and water.