Convert Pounds per Gallon to Milligrams per Liter
1 pound per gallon (lb/gal) equals 119826.4273 milligrams per liter (mg/L).
1 lb/gal = 119826.4273 mg/L
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk pound per gallon to milligram per liter converter to paste a column from Excel.
How to Convert Pound per Gallon to Milligram per Liter
- 1 lb/gal = 119826.4273 mg/L
- 1 mg/L = 0.000008345404452 lb/gal
- Example: convert 15 lb/gal to mg/L: 15 lb/gal = 15 × 119826.4273 mg/L = 1797396.41 mg/L
Reference conditions. lb/gal: Per US gallon (231 in³).
Formula
mg/L = lb/gal × 119826.4273169
Derivation from SI units:
- 1 lb/gal = 0.45359237 kg ÷ 0.003785411784 m³ = 119.8264273 kg/m³
- 1 mg/L = 10⁻⁶ kg ÷ 10⁻³ m³ = 10⁻³ kg/m³
- 1 lb/gal = 119.8264273169 kg/m³ ÷ 0.001 kg/m³ per mg/L = 119826.4273169 mg/L
Both units are defined exactly, so the factor is exact. Pound per Gallon definition: pound per gallon; Milligram per Liter definition: milligram per liter.
Worked examples
- A reading of 7.1 lb/gal converts to 850767.6339 mg/L.
7.1 lb/gal × 119826.4273 = 850767.6339 mg/L - A value of 10 lb/gal is 1198264.273 mg/L.
10 lb/gal × 119826.4273 = 1198264.273 mg/L
Pound per Gallon to Milligram per Liter conversion table
| Pounds per Gallon (lb/gal) | Milligrams per Liter (mg/L) |
|---|---|
| 5 lb/gal | 599132.1366 mg/L |
| 6 lb/gal | 718958.5639 mg/L |
| 6.1 lb/gal | 730941.2066 mg/L |
| 7 lb/gal | 838784.9912 mg/L |
| 7.1 lb/gal | 850767.6339 mg/L |
| 8.34 lb/gal | 999352.4038 mg/L |
| 9 lb/gal | 1078437.846 mg/L |
| 9.5 lb/gal | 1138351.06 mg/L |
| 10 lb/gal | 1198264.273 mg/L |
| 12 lb/gal | 1437917.128 mg/L |
| 14 lb/gal | 1677569.982 mg/L |
| 16 lb/gal | 1917222.837 mg/L |
| 18 lb/gal | 2156875.692 mg/L |
Where it's used
Pounds per Gallon are used for drilling-mud weight in the oil and gas industry (ppg), while milligrams per liter appear in water quality (dissolved oxygen, nitrate, chlorine). Both measure density (mass per unit volume) and mass concentration, so the conversion is a fixed factor.
Pound per Gallon to other density units
| Conversion | 1 lb/gal equals |
|---|---|
| pound per gallon to kilogram per cubic meter | 119.8264273 kg/m³ |
| pound per gallon to gram per cubic centimeter | 0.1198264273 g/cm³ |
| pound per gallon to kilogram per liter | 0.1198264273 kg/L |
| pound per gallon to gram per liter | 119.8264273 g/L |
| pound per gallon to milligram per liter | 119826.4273 mg/L |
| pound per gallon to pound per cubic foot | 7.480519481 lb/ft³ |
| pound per gallon to pound per cubic inch | 0.004329004329 lb/in³ |
Frequently asked questions
How many milligrams per liter are in 1 pound per gallon?
1 lb/gal = 119826.4273 mg/L.
How do I convert pounds per gallon to milligrams per liter?
Multiply the value in lb/gal by 119826.4273. For example, 15 lb/gal × 119826.4273 = 1797396.41 mg/L.
Is the lb/gal to mg/L conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "pound per gallon (U.S.)".
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 8 (litre) with SI prefix milli.
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Pounds per Gallon to Milligrams per Liter. Retrieved October 17, 2026, from https://scientificconverters.com/density/pounds-per-gallon-to-milligrams-per-liter/
IEEE
Scientific Converters, "Convert Pounds per Gallon to Milligrams per Liter," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/density/pounds-per-gallon-to-milligrams-per-liter/