- Alcohol amount in the aqueous alcohol solution
Defines the mass and volume fraction of ethanol in the solution of two liquids with different levels of alcohol.

- CaCl2 ppm to chlorides WPS ppm converter
This online calculator converts given CaCl2 ppm concentration into chlorides water phase salinity ppm concentration

This online calculator can be used to find out required amount of dry glue and water to get the needed solution strength

- Raoult's Second law and the freezing temperature.
Calculation of boiling point and crystallization (freezing) of non-electrolyte solutions.

- Solution of buckets and tank problem
This online calculator find a solution to the question how to fill tank with certain amount of water using two buckets of different size

- Strength of alcoholic cocktail
Calculates volume fraction of alcohol in a beverage made of 3 other beverages.

- Сomputer algebra
Derives a formula from input formulas and input data to calculate remained parameters