How do you calculate 1 is to 2000 dilution?

To calculate a 1:2000 dilution, you mix 1 part of the substance with 1999 parts of the diluent (such as water or buffer). For example, if you want to prepare 2000 mL of the diluted solution, you would use 1 mL of the concentrated substance and add 1999 mL of the diluent. The total volume after mixing should equal 2000 mL, maintaining the 1:2000 ratio.