What is CC to mL Volume Converter (Medical + Engine)?
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Cubic Centimeters to Milliliters Converter
cc to mL converter
Multiply by 1 to convert cc to mL.
How is this calculated?
1 cc = 1 mL. Conversion factor sourced from NIST SP 811 (Guide for the Use of the International System of Units).
1 cc = 1 mL exactly. Used in medicine (insulin doses), engineering (engine displacement), chemistry (volumetric measurements).
Quick reference: cubic centimeters to milliliters
| cubic centimeters | milliliters |
|---|---|
| 1 cubic centimeters | 1 milliliters |
| 10 cubic centimeters | 10 milliliters |
| 100 cubic centimeters | 100 milliliters |
| 1,000 cubic centimeters | 1,000 milliliters |
| 10,000 cubic centimeters | 10,000 milliliters |
About cc to mL conversion
A cubic centimeter (cc, cm^3) and a milliliter (mL) are the same physical volume by SI definition, so the conversion is a direct one-to-one swap. The two names just survive in different industries: cc rules medical syringes and engine displacement, mL rules pharmacy bottles and chemistry beakers.
How it works: the cc equals mL identity
The SI defines the liter as exactly one cubic decimeter (1 L = 1 dm^3 = 1,000 cm^3). Dividing both sides by 1,000 gives 1 mL = 1 cm^3 = 1 cc. The conversion factor is 1 and is exact at any precision; no rounding ever enters the math.
1 cc = 1 cm^3 = 1 mL (exact, SI) 1 L = 1 dm^3 = 1,000 mL = 1,000 cc volume_mL = volume_cc * 1 volume_cc = volume_mL * 1
- cc / cm^3 = cubic centimeter, the CGS unit of volume.
- mL = milliliter, the SI-derived unit (1 thousandth of a liter).
- L / dm^3 = liter, exactly 1 cubic decimeter since 1964 (12th CGPM).
- The factor is unitless 1 because the units are physically identical, not approximately equal.
- The same is NOT true for cubic inch to milliliter: 1 in^3 = 16.387 mL.
Worked example: 250 cc IV bag
A nurse pulls a 250 cc saline bag from the cabinet and the chart asks for a 0.9 percent NaCl drip at 50 mL/hr. Convert the bag volume to milliliters and compute the run time.
- Bag volume: 250 cc x 1 = 250 mL.
- Drip rate: 50 mL/hr (chart-prescribed).
- Run time: 250 mL / 50 mL/hr = 5 hours.
- Cross-check via cc: 250 cc / 50 cc/hr = 5 hours. Identical, as expected.
- Sodium load: 0.9 percent w/v means 0.9 g NaCl per 100 mL, so 250 mL holds 2.25 g NaCl.
Common kitchen and medical volume conversions
Both cc and mL are interchangeable in this table since they are equal. The other units (teaspoons, tablespoons, cups, fluid ounces) need their own factors.
| Unit | Milliliters (mL) | Cubic centimeters (cc) | Notes |
|---|---|---|---|
| 1 teaspoon (US) | 4.929 mL | 4.929 cc | Rounded to 5 mL in clinical use |
| 1 tablespoon (US) | 14.787 mL | 14.787 cc | Rounded to 15 mL |
| 1 US fluid ounce | 29.574 mL | 29.574 cc | One liquor shot |
| 1 imperial fluid ounce | 28.413 mL | 28.413 cc | UK / pre-2000 Commonwealth |
| 1 metric cup | 250 mL | 250 cc | AU, NZ baking |
| 1 US cup | 236.588 mL | 236.588 cc | Rounded to 240 mL in nutrition |
| 1 US pint | 473.176 mL | 473.176 cc | 16 fl oz |
| 1 liter | 1,000 mL | 1,000 cc | 1 dm^3 |
| 1 US gallon | 3,785.41 mL | 3,785.41 cc | 231 in^3 exactly |
Common pitfalls
- Confusing cc with cubic inches. A 350 in^3 small-block V8 is not 350 cc, it is 5,735 cc (350 x 16.387) or 5.7 liters. Engine catalogues often list both.
- Mixing US and imperial fluid ounces. A 16 oz US bottle is 473 mL; a 16 oz UK bottle is 455 mL. Recipes from older British cookbooks underdose by about 4 percent if read as US ounces.
- Treating cc as a mass. cc is volume, not weight. 1 cc of water weighs about 1 g at 4 degrees Celsius, but 1 cc of mercury weighs 13.5 g. Density matters whenever the formulary specifies grams.
- Handwriting cc as 0 or zeros. The Joint Commission's Do-Not-Use list flags cc as risky because cursive cc can read as 00 (a hundredfold overdose). Modern medication records require mL.
- Mass-volume on body weight dosing. A drug listed as 5 mg/cc is the same as 5 mg/mL. Confirm the concentration column heading rather than trusting the unit name.
Related tools and glossary
Frequently asked questions
Is cc exactly the same as mL?
Yes, by SI definition 1 cubic centimeter (cc or cm^3) equals exactly 1 milliliter (mL), which equals 0.001 liter. The two units are dimensionally identical and the conversion factor is 1. NIST Special Publication 811 and the BIPM SI Brochure both confirm the equivalence.
Why do doctors and engineers still use cc?
cc is a legacy CGS unit that predates the SI adoption of mL as the preferred symbol in 1964. Hospitals in the US, UK, and India often still use cc on insulin syringes and ICU fluid orders, and automotive engineering uses cc for engine displacement (a 1,000 cc engine is a 1-liter engine). The Joint Commission has urged a shift to mL since 2004 to cut handwriting errors.
How does 1 cc compare to 1 US fluid ounce or teaspoon?
1 US fluid ounce equals 29.5735 mL (or 29.5735 cc). 1 imperial fluid ounce equals 28.4131 mL. 1 US teaspoon is 4.929 mL, usually rounded to 5 mL. A 12 fl oz US soda holds 355 mL = 355 cc, and a 16.9 fl oz water bottle holds 500 mL = 500 cc.
What is engine displacement in cc and how does it map to liters?
Engine displacement is the total swept volume of all cylinders per revolution. A 1,500 cc engine displaces 1.5 liters per revolution because 1,000 cc = 1 liter. Motorcycles use cc directly (a 600 cc sportbike), while cars use liters (a 2.0L turbo equals 2,000 cc). Larger displacement usually means more torque, more fuel use, and higher road tax in jurisdictions that tax by cc.
Sources
- BIPM (2019) SI Brochure, 9th edition - liter and cubic decimeter equivalence.
- NIST Special Publication 811 (2008) Guide for the Use of the International System of Units - cc and mL equivalence statement.
- 12th CGPM (1964), Resolution 6 - reinstated the liter as exactly 1 dm^3.
- The Joint Commission (2004) Official Do Not Use List of Abbreviations - cc replaced by mL in medication orders.