Convert Percent and Ratio

Converter for percentages and ratios in the form 1 to x or x to 1 for two values that together make up a total. Such a ratio indicates how much of a certain thing is contained in the whole compared to the rest. This special calculation is only useful for two values that add up to 100 percent.

Please enter a value between 0 and 100 for percent or two positive values for the ratio, the other value ratio or percent will be calculated.
The ratio of percent is always calculated with 1, so for 30 percent the ratio is 1 to 2.333... However, any number can be entered for the ratio, for example 2 to 3, to calculate the percentage value.

Example: if the ratio of A to B is 1 to 3, then A is 25 percent of A and B together. B is then 75 percent. B is the opposite of A, for example if A is made up of red spheres, then B is all parts of the total that are not red spheres. One red sphere is there for every three other parts.

There is a special feature to note in this calculation. Here the ratio of two parts of a total is calculated. There is also the ratio of one part to the total. An example: if A to B is in a ratio of 1 to 3, then B occurs three times as often as A, but is 25 percent of the total. This ratio is what is meant here. The total number is 4, so A is in a ratio of 1 to 4 to this. This 1 to 4, which is not meant here, would be normal fractional calculation, where you could also say or write 1/4 (one quarter).

Which ratio is to be calculated depends on the individual case, of course, and is sometimes not so easy to decide. Whether two parts of a whole are to be compared with each other, or one or more parts in comparison to the whole, often requires more thought than the rather simple calculation itself. This is something a calculator cannot do.

Percent:
Ratio:	to