Pound per Million Gallon (US) to Part per Million Conversion

Convert between Pound per Million Gallon (US) and Part per Million quickly and accurately.

lb/million gal (US)
ppm

How to Convert Pound per Million Gallon (US) to Part per Million

Conversion Formula

1 lb/million gal (US) = 0.12 ppm
1 ppm = 8.336 lb/million gal (US)

Example

Convert 15 lb/million gal (US) to ppm:

15 lb/million gal (US) = 15 × 0.12 ppm = 1.799 ppm

Unit Information

Learn about the concentration - solution units you're converting between

Pound per Million Gallon (US)

lb/million gal (US)

Definition

The pound per million gallon (US) is a unit of mass concentration used for very dilute solutions in the United States, representing pounds of solute per million US gallons of solution. It is used for trace concentrations.

History/Origin

This unit was developed for expressing very low concentrations in large volumes, particularly in water treatment and environmental applications. It provides a practical way to express trace concentrations in US industrial systems.

Current Use

Used in the United States for water treatment, environmental monitoring, and industrial applications where very dilute solutions are involved. It is commonly found in water quality reports and environmental assessments.

Multiplier

1E-7

Offset

0

Part per Million

ppm

Definition

Parts per million is a dimensionless unit expressing the ratio of one part solute to one million parts solution by mass. It is widely used for expressing very low concentrations in environmental and industrial applications.

History/Origin

The concept of parts per million originated in analytical chemistry as a convenient way to express very small concentrations. It became standardized in environmental regulations and industrial quality control for its simplicity and clarity.

Current Use

Universally used in environmental science, water treatment, air quality monitoring, and industrial quality control. It is the standard unit for expressing concentrations of contaminants, additives, and trace elements in various media.

Multiplier

1E-6

Offset

0

Pound per Million Gallon (US) to Part per Million Conversion Table

Pound per Million Gallon (US) [lb/million gal (US)] Part per Million [ppm]
1 lb/million gal (US) 0.119963 ppm
10 lb/million gal (US) 1.199633 ppm
25 lb/million gal (US) 2.999083 ppm
50 lb/million gal (US) 5.998165 ppm
100 lb/million gal (US) 11.996331 ppm
0 lb/million gal (US) 0E+0 ppm
-10 lb/million gal (US) -1.199633 ppm
-40 lb/million gal (US) -4.798532 ppm