About

Converting mass (mcg) to volume (ml) is physically impossible without a third variable: Density or Concentration. This constraint is frequently encountered in clinical settings where a specific medication mass must be drawn from a liquid solution of known strength.

For example, if a prescription calls for 500 mcg of a drug, and the vial concentration is 100 mcg/ml, the required volume is 5 ml. Ignoring the concentration factor results in dangerous dosing errors. This tool includes a database of common fluid densities (like water, ethanol, and saline) but allows custom concentration inputs for pharmaceutical accuracy.

Formulas

To derive volume from mass, the mass is divided by the density (or concentration) of the substance.

V_(ml) = m_(mcg)ρ_(mcg/ml)

Where ρ represents the density or concentration. Note that 1 g/ml is equivalent to 1,000,000 mcg/ml.

Reference Data

Substance	Density / Concentration	Mass (mcg)	Volume (ml)
Water (Standard)	1,000,000 mcg/ml	1,000,000	1.0
Ethanol	789,000 mcg/ml	1,000,000	1.267
Saline (Normal)	1,004,600 mcg/ml	1,000,000	0.995
Olive Oil	917,000 mcg/ml	1,000,000	1.09
Mercury	13,534,000 mcg/ml	1,000,000	0.074
Gasoline	740,000 mcg/ml	1,000,000	1.35
Milk	1,030,000 mcg/ml	1,000,000	0.97
Honey	1,420,000 mcg/ml	1,000,000	0.70

Frequently Asked Questions

Mass (weight) and Volume (space) are different physical properties. A kilogram of feathers takes up more space than a kilogram of lead. Without knowing the "tightness" of the material (density) or the strength of the solution (concentration), conversion is mathematically impossible.

1 g/ml is equal to 1,000,000 mcg/ml. If your density is 1 g/ml (water), enter 1,000,000 into the concentration field, or simply select "Water" from the preset list.

While the math is accurate, clinical dosage calculations should always be double-checked by a qualified professional. This tool serves as a calculation aid, not a medical prescription device.