ppm to %

Questions and answers on how to convert things from one unit or system to another
Forum rules
Dear convert-me.com forum visitors,

Our forum has been available for many years. In September 2014 we decided to switch it to read-only mode. Month after month we saw less posts with questions and answers from real people and more spam posts. We were spending more and more resources cleaning the spam until there were less them 1 legitimate message per 100 spam posts. Then we decided it's time to stop.

All the posts in the forum will be available and searchable. We understand there are a lot of useful information and we aren't going to remove anything. As for the new questions, you can always ask them on convert-me.com FaceBook page

Thank you for being with us and sorry for any inconveniences this could caused.

ppm to %

Postby Guest » Sun Jan 24, 2010 6:40 pm

How do I convert ppm to %?
For instance:
Toothpaste with 0.76% sodium monofluorophosphate = ? ppm
Toothpaste with 0.243% sodium fluoride = ? ppm
Thank you!
Guest
 

Re: ppm to %

Postby Dirtman » Mon Jan 25, 2010 7:44 am

Guest wrote:How do I convert ppm to %?
For instance:
Toothpaste with 0.76% sodium monofluorophosphate = ? ppm
Toothpaste with 0.243% sodium fluoride = ? ppm
Thank you!


ppm is parts per million; percent is parts per 100: 1,000,000 / 100 = 10 000

To convert percent to ppm, multiply by 10 000
To convert ppm to percent, divide by 10 000

0.76% * 10 000 = 7 600 ppm
Dirtman
Expert
 
Posts: 574
Joined: Sat Jan 21, 2006 2:04 pm
Location: California

Re: ppm to %

Postby physicsmum » Tue May 25, 2010 3:13 am

Hi. The previous answer is incorrect as ppm on toothpaste is referring to parts of flourine (F), not of the MFP.
This is published research giving a couple of examples:
www*dot*ncbi*dot*nlm*dot*nih*dot*gov/pubmed/3288434
MFP 0.76 % = 1000 ppm
0.20% sodium fluoride (920 ppm fluoride), so your 0.243 % would be 1118 ppm

Hope this helps (and is correct...)

Jen Stratford.
physicsmum
 


More info

  • List of all units you can convert online
  • Metric conversion
  • Convert grams to cups
  • Grams to milliliters
  • Imperial vs US Customary
  • History of measurement
  • Return to How to convert?



    Our Privacy Policy       Cooking Measures Converter       Metric conversions