Who is not stumbled on the small problem of „the rule of three calculation“ which can occure inany situation. It often happens during cooking when recipes must be adapted to a larger or smaller number of people or other ratios. Of course it is a simple calculation but in the rush you can always make mistakes.
Right here you can use this app with three useful functions.

3calc Conversion of ratios (rule of three calculation)

- for a meal of 4 people you need 150g,
 how much g is needed for only 3 people?

- 250g is enough for 6 units. How many units can be made
 from 150g?
Convert Conversion of units
 (temperature, volume, weight and energy (International, US, UK, some Japan and Chinese)
Timer Easy to use stopwatch (hours, minutes, seconds)