Question 1

What concentration units can I convert?

Accepted Answer

This tool converts between ppm, ppb, mg/L, g/L, molarity, percent, and more.

Question 2

What is the difference between ppm and mg/L?

Accepted Answer

For aqueous solutions at normal conditions, ppm and mg/L are essentially equal. 1 ppm = 1 mg/L.

Question 3

When do I use molarity vs mass concentration?

Accepted Answer

Molarity (mol/L) is used in chemistry. Mass concentration (mg/L) is common in environmental testing.

Concentration Converter

Frequently Asked Questions