Milliliters to Milligrams Converter (mL to mg)
Convert milliliters to milligrams (mL to mg) for any substance. Select from 20 common ingredients or enter a custom density. Ideal for medication dosing and lab work.
WEIGHT IN MILLIGRAMS
5,000 mg
GRAMS
5.00 g
OUNCES
0.1764 oz
TEASPOONS
1.01 tsp
FORMULA
5Γ1Γ1000
Quick Reference β Water
| Milliliters | Milligrams | Grams | Teaspoons |
|---|---|---|---|
| 0.5 mL | 500 mg | 0.50 g | 0.10 tsp |
| 1 mL | 1,000 mg | 1.00 g | 0.20 tsp |
| 2 mL | 2,000 mg | 2.00 g | 0.41 tsp |
| 2.5 mL | 2,500 mg | 2.50 g | 0.51 tsp |
| 5 mL | 5,000 mg | 5.00 g | 1.01 tsp |
| 10 mL | 10,000 mg | 10.00 g | 2.03 tsp |
| 15 mL | 15,000 mg | 15.00 g | 3.04 tsp |
| 20 mL | 20,000 mg | 20.00 g | 4.06 tsp |
| 25 mL | 25,000 mg | 25.00 g | 5.07 tsp |
| 30 mL | 30,000 mg | 30.00 g | 6.09 tsp |
| 50 mL | 50,000 mg | 50.00 g | 10.14 tsp |
| 100 mL | 100,000 mg | 100.00 g | 20.29 tsp |
How to Convert Milliliters to Milligrams
Milliliters measure volume while milligrams measure weight. To convert between them, you need the substance's density:
Example: 5 mL of water (density 1.00 g/mL)
= 5 Γ 1.00 Γ 1,000 = 5,000 mg
Example: 5 mL of olive oil (density 0.91 g/mL)
= 5 Γ 0.91 Γ 1,000 = 4,550 mg
Example: 5 mL of honey (density 1.43 g/mL)
= 5 Γ 1.43 Γ 1,000 = 7,150 mg
Milliliters to Milligrams β By Substance
| Substance | Density (g/mL) | 1 mL = | 5 mL = | 10 mL = |
|---|---|---|---|---|
| Water | 1.00 | 1,000 mg | 5,000 mg | 10,000 mg |
| Whole Milk | 1.03 | 1,030 mg | 5,150 mg | 10,300 mg |
| Olive Oil | 0.91 | 910 mg | 4,550 mg | 9,100 mg |
| Honey | 1.43 | 1,430 mg | 7,150 mg | 14,300 mg |
| Rubbing Alcohol | 0.79 | 790 mg | 3,950 mg | 7,900 mg |
| Glycerin | 1.26 | 1,260 mg | 6,300 mg | 12,600 mg |
| Maple Syrup | 1.33 | 1,330 mg | 6,650 mg | 13,300 mg |
| Coconut Oil (liquid) | 0.92 | 920 mg | 4,600 mg | 9,200 mg |
| Soy Sauce | 1.20 | 1,200 mg | 6,000 mg | 12,000 mg |
| Vanilla Extract | 0.88 | 880 mg | 4,400 mg | 8,800 mg |
Medication Dosing β mL to mg Reference
Many liquid medications are labeled in mg but measured in mL. Common US OTC medications:
| Medication | Concentration | 5 mL dose = | 10 mL dose = |
|---|---|---|---|
| Children's Tylenol | 160 mg per 5 mL | 160 mg | 320 mg |
| Children's Motrin | 100 mg per 5 mL | 100 mg | 200 mg |
| Benadryl Liquid | 12.5 mg per 5 mL | 12.5 mg | 25 mg |
| NyQuil | 650 mg/30 mL dose | 108 mg | 217 mg |
| Amoxicillin Susp. | 250 mg per 5 mL | 250 mg | 500 mg |
β οΈ Important: This table is for reference only. Always follow your doctor's or pharmacist's instructions for medication dosing.
mL vs. cc β Are They the Same?
Yes. 1 mL = 1 cc (cubic centimeter). In medical and pharmaceutical settings, you'll see both abbreviations used interchangeably. A "3 cc syringe" holds exactly 3 mL. The term "cc" is more common in medical jargon, while "mL" is the standard SI unit used on medication labels.
Measuring Small Volumes
| Tool | Typical Size | Best For |
|---|---|---|
| Oral syringe | 1 mL, 5 mL, 10 mL | Most accurate for medication |
| Medicine dropper | ~1 mL (20 drops) | Essential oils, infant doses |
| Dosing cup | 5 mL β 30 mL | Liquid cold/flu medicine |
| Teaspoon | ~5 mL | Kitchen β NOT precise for meds |
| Tablespoon | ~15 mL | Kitchen β NOT precise for meds |
What Is a Milliliter?
A milliliter (mL) is a metric unit of volume equal to one thousandth of a liter (1/1,000 L) or one cubic centimeter (1 cc). In medicine, mL is the standard unit for liquid dosing. One US teaspoon equals approximately 4.929 mL, though for medication labeling the FDA uses 5 mL per teaspoon.
What Is a Milligram?
A milligram (mg) is a metric unit of mass equal to one thousandth of a gram (1/1,000 g) or one millionth of a kilogram. Drug dosages are almost always expressed in milligrams. For water-based solutions (density ~1.0 g/mL), 1 mL = 1,000 mg β a clean conversion specific to water.
When to Convert mL to mg
- Medication dosing: A prescription says "take 10 mL" β you want to know how many mg of active ingredient that contains.
- Supplement drops: Vitamin D drops are measured in mL but labeled in IU/mg.
- Lab chemistry: Converting between measured volumes and required masses for solutions.
- Cooking: A recipe uses mL for a flavoring but the label shows mg per serving.
- Essential oils: Dosing by drops (volume) while safety limits are given in mg.