Convert Grams per Liter to Milligrams per Liter
1 gram per liter (g/L) equals 1000 milligrams per liter (mg/L).
1 g/L = 1000 mg/L
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk gram per liter to milligram per liter converter to paste a column from Excel.
How to Convert Gram per Liter to Milligram per Liter
- 1 g/L = 1000 mg/L
- 1 mg/L = 0.001 g/L
- Example: convert 15 g/L to mg/L: 15 g/L = 15 × 1000 mg/L = 15000 mg/L
Formula
mg/L = g/L × 1000
Derivation from SI units:
- 1 g/L = 10⁻³ kg ÷ 10⁻³ m³ = 1 kg/m³
- 1 mg/L = 10⁻⁶ kg ÷ 10⁻³ m³ = 10⁻³ kg/m³
- 1 g/L = 1 kg/m³ ÷ 0.001 kg/m³ per mg/L = 1000 mg/L
Both units are defined exactly, so the factor is exact. Gram per Liter definition: gram per liter; Milligram per Liter definition: milligram per liter.
Worked examples
- 1 g/L is 1000 mg/L.
1 g/L × 1000 = 1000 mg/L - 0.25 g/L is 250 mg/L.
0.25 g/L × 1000 = 250 mg/L
Gram per Liter to Milligram per Liter conversion table
| Grams per Liter (g/L) | Milligrams per Liter (mg/L) |
|---|---|
| 0.1 g/L | 100 mg/L |
| 0.5 g/L | 500 mg/L |
| 1 g/L | 1000 mg/L |
| 1.2 g/L | 1200 mg/L |
| 1.98 g/L | 1980 mg/L |
| 5 g/L | 5000 mg/L |
| 9 g/L | 9000 mg/L |
| 10 g/L | 10000 mg/L |
| 35 g/L | 35000 mg/L |
| 50 g/L | 50000 mg/L |
| 100 g/L | 100000 mg/L |
| 1000 g/L | 1000000 mg/L |
Where it's used
Concentrations in g/L are converted to mg/L for water-quality limits and analytical reports. Multiply by 1000.
Gram per Liter to other density units
| Conversion | 1 g/L equals |
|---|---|
| gram per liter to kilogram per cubic meter | 1 kg/m³ |
| gram per liter to gram per cubic centimeter | 0.001 g/cm³ |
| gram per liter to kilogram per liter | 0.001 kg/L |
| gram per liter to milligram per liter | 1000 mg/L |
| gram per liter to pound per cubic foot | 0.06242796058 lb/ft³ |
| gram per liter to pound per cubic inch | 0.000036127292 lb/in³ |
| gram per liter to pound per gallon | 0.008345404452 lb/gal |
Frequently asked questions
How many mg/L is 1 g/L?
Exactly 1000 mg/L.
How many milligrams per liter are in 1 gram per liter?
1 g/L = 1000 mg/L.
How do I convert grams per liter to milligrams per liter?
Multiply the value in g/L by 1000. For example, 15 g/L × 1000 = 15000 mg/L.
Is the g/L to mg/L conversion exact?
Yes. Both units are defined exactly, and 1 g/L is exactly 1000 mg/L.
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 8 (litre).
- 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 Grams per Liter to Milligrams per Liter. Retrieved October 17, 2026, from https://scientificconverters.com/density/grams-per-liter-to-milligrams-per-liter/
IEEE
Scientific Converters, "Convert Grams per Liter to Milligrams per Liter," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/density/grams-per-liter-to-milligrams-per-liter/