Conversor de mg para ml (densidade)
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
ml = mg / (densidade × 1000)
About this calculator
This calculator converts milligrams (mg) to milliliters (ml) using the substance's density. The formula is: volume (ml) = mass (mg) / (density (g/ml) × 1000). For example, to convert 500 mg of water (density 1 g/ml): 500 / (1 × 1000) = 0.5 ml.
The converter is useful in everyday situations, such as measuring liquid medications, recipe ingredients, or chemicals. Many tablets or syrups indicate dosage in mg, but administration is in ml. Knowing the density of the liquid is essential for accurate calculation.
Important precautions: density varies by substance and temperature. Water has a density of 1 g/ml, but oils (0.9 g/ml) and alcohol (0.8 g/ml) differ. Always check the density on the product label or from reliable sources. Do not use for substances with unknown density, as the result will be inaccurate.
Use cases: adjusting medication doses prescribed in mg for syringes marked in ml, preparing homemade solutions, or calculating volumes in simple experiments. Remember that this tool is for informational purposes and does not replace professional medical advice.
Frequently asked questions
Can I convert mg to ml without knowing the density?
No, density is essential. Without it, the calculation is not possible. For water, you can use 1 g/ml as an approximation, but for other substances the exact value is needed.
What is the density of water in g/ml?
The density of water is approximately 1 g/ml at 4°C. At room temperature, it is still about 1 g/ml, making it a common reference.
Is this calculator suitable for medications?
Yes, but only as a reference. Always consult a healthcare professional for precise dosages, as medications may have specific densities and require care.
How do I find the density of a substance?
Check the product label, medication leaflet, or consult online density tables. Some manufacturers provide the density in g/ml.
What does mg/ml mean?
mg/ml is a unit of concentration, indicating how many milligrams of solute are in each milliliter of solution. Do not confuse it with the direct conversion from mg to ml.