Convert Milligrams per Liter to Grams per Liter
1 milligram per liter (mg/L) equals 0.001 grams per liter (g/L).
1 mg/L = 0.001 g/L
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk milligram per liter to gram per liter converter to paste a column from Excel.
How to Convert Milligram per Liter to Gram per Liter
- 1 mg/L = 0.001 g/L
- 1 g/L = 1000 mg/L
- Example: convert 15 mg/L to g/L: 15 mg/L = 15 × 0.001 g/L = 0.015 g/L
Formula
g/L = mg/L ÷ 1000
Derivation from SI units:
- 1 mg/L = 10⁻⁶ kg ÷ 10⁻³ m³ = 10⁻³ kg/m³
- 1 g/L = 10⁻³ kg ÷ 10⁻³ m³ = 1 kg/m³
- 1 mg/L = 0.001 kg/m³ ÷ 1 kg/m³ per g/L = 0.001 g/L
Both units are defined exactly, so the factor is exact. Milligram per Liter definition: milligram per liter; Gram per Liter definition: gram per liter.
Worked examples
- A total dissolved solids level of 500 mg/L is 0.5 g/L.
500 mg/L × 0.001 = 0.5 g/L - Seawater salinity of about 35000 mg/L is 35 g/L.
35000 mg/L × 0.001 = 35 g/L
Milligram per Liter to Gram per Liter conversion table
| Milligrams per Liter (mg/L) | Grams per Liter (g/L) |
|---|---|
| 0.01 mg/L | 0.00001 g/L |
| 0.1 mg/L | 0.0001 g/L |
| 0.5 mg/L | 0.0005 g/L |
| 1 mg/L | 0.001 g/L |
| 2 mg/L | 0.002 g/L |
| 5 mg/L | 0.005 g/L |
| 8 mg/L | 0.008 g/L |
| 10 mg/L | 0.01 g/L |
| 50 mg/L | 0.05 g/L |
| 100 mg/L | 0.1 g/L |
| 250 mg/L | 0.25 g/L |
| 500 mg/L | 0.5 g/L |
| 1000 mg/L | 1 g/L |
Where it's used
Water-quality concentrations in mg/L are converted to g/L for brines, process streams and lab solutions. Divide by 1000.
Milligram per Liter to other density units
| Conversion | 1 mg/L equals |
|---|---|
| milligram per liter to kilogram per cubic meter | 0.001 kg/m³ |
| milligram per liter to gram per cubic centimeter | 0.000001 g/cm³ |
| milligram per liter to kilogram per liter | 0.000001 kg/L |
| milligram per liter to gram per liter | 0.001 g/L |
| milligram per liter to pound per cubic foot | 0.00006242796058 lb/ft³ |
| milligram per liter to pound per cubic inch | 3.6127292 × 10⁻⁸ lb/in³ |
| milligram per liter to pound per gallon | 0.000008345404452 lb/gal |
Frequently asked questions
Is mg/L the same as ppm?
For dilute water solutions, approximately: 1 mg/L ≈ 1 ppm by mass, because a litre of water has a mass of about 1 kg.
How many grams per liter are in 1 milligram per liter?
1 mg/L = 0.001 g/L.
How do I convert milligrams per liter to grams per liter?
Multiply the value in mg/L by 0.001, or divide it by 1000. For example, 15 mg/L × 0.001 = 0.015 g/L.
Is the mg/L to g/L conversion exact?
Yes. Both units are defined exactly, and 1 mg/L is exactly 0.001 g/L.
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 8 (litre) with SI prefix milli.
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 8 (litre).
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 Milligrams per Liter to Grams per Liter. Retrieved October 17, 2026, from https://scientificconverters.com/density/milligrams-per-liter-to-grams-per-liter/
IEEE
Scientific Converters, "Convert Milligrams per Liter to Grams per Liter," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/density/milligrams-per-liter-to-grams-per-liter/