# Convert 25 parts-pm to parts-pt

In this article I will show you how to convert 25 parts-per million into parts-per trillion. Throughout the explanation below I might also call it 25 parts-pm to parts-pt. They are the same thing!

## How to Convert Parts-per million to Parts-per trillion

A parts-per million is smaller than a parts-per trillion. I know that a parts-pm is smaller than a parts-pt because of something called conversion factors.

Put very simply, a conversion factor is a number that can be used to change one set of units to another, by multiplying or dividing it. So when we need to convert 25 parts-per million into parts-per trillion, we use a conversion factor to get the answer.

The conversion factor for parts-pm to parts-pt is:

1 parts-pm = 1.0E-6 parts-pt

Now that we know what the conversion factor is, we can easily calculate the conversion of 25 parts-pm to parts-pt by multiplying `1.0E-6` by the number of parts-per million we have, which is 25.

25 x 1.0E-6 = 2.5E-5 parts-pt

So, the answer to the question "what is 25 parts-per million in parts-per trillion?" is 2.5E-5 parts-pt.

## Parts-per million to Parts-per trillion Conversion Table

Below is a sample conversion table for parts-pm to parts-pt:

Parts-per million (parts-pm) Parts-per trillion (parts-pt)
0.010
0.10
10
20
30
50
100
200
500
1000
10000

## Best Conversion Unit for 25 parts-pm

Sometimes when you work with conversions from one unit to another, the numbers can get a little confusing. Especially when dealing with really large numbers.

I've also calculated what the best unit of measurement is for 25 parts-pm.

To determine which unit is best, I decided to define that as being the unit of measurement which is as low as possible, without going below 1. Smaller numbers are more easily understood and can make it easier for you to understand the measurement.

The best unit of measurement I have found for 25 parts-pm is parts-per million and the amount is 25 parts-pm.