mg to cc Conversion

Milligrams (mg) measure mass. Cubic centimeters (cc) measure volume, and in medical contexts cc is used as a synonym for milliliters. To convert mg to cc, you need a concentration, written as mg per mL.

How the conversion works

If a solution has concentration $C$ in mg/mL and you want a dose $D$ in mg:

$$V_{\text{mL}} = \frac{D_{\text{mg}}}{C_{\text{mg/mL}}}$$

Because $1\,\text{cc} = 1\,\text{mL}$, the same value works in cc.

Units and conversions

Worked examples

1. Converting 500 mg at 50 mg/mL

   $$V = \frac{500}{50} = 10\,\text{mL} = 10\,\text{cc}$$

   Result: 10 cc.

2. Converting 2 cc at 100 mg/mL into mg

   $$D = 2\,\text{mL} \times 100\,\text{mg/mL} = 200\,\text{mg}$$

   Result: 200 mg.

Tips and pitfalls

• Concentration drives everything. A different strength changes the volume for the same mg dose.
• Keep units consistent. If your concentration is mg/cc, treat it the same as mg/mL.
• Round based on your syringe or measuring device, not on the first intermediate step.

References and further reading

• Concentration - Wikipedia
• Cubic centimetre - Wikipedia