Switch to full style
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.

conversion of mg per liter to parts per million

Sun Apr 10, 2005 4:59 am

the DDT level measured in a tropical ecosystem were between 0.16 and 0.28 mg per liter
convert it into parts per million?

Sun Apr 10, 2005 5:19 am

You have to ask "per liter of what, and how much does it weigh." Parts per million is a ratio between two like quanties, weight to weight, or volume to volume, not mixed.

If it is a liter of water (or about the same specific gravity) one liter of water weighs 1 kilogram, and 1 mg/kg would be 1 ppm.
Blood, saline, etc are slightly heavier than 1 kg/L, fats and oils are slightly lighter.

Re: conversion of mg per liter to parts per million

Mon Apr 11, 2005 2:10 am

jaweria wrote:the DDT level measured in a tropical ecosystem were between 0.16 and 0.28 mg / L
convert it into parts per million?

Re: conversion of mg per liter to parts per million

Mon Apr 11, 2005 3:44 am

Anonymous wrote:
jaweria wrote:the DDT level measured in a tropical ecosystem were between 0.16 and 0.28 mg / L (maximum acceptable concentration)in water
convert it into parts per million?